---
product_id: 409657141
title: "Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles"
brand: "jin bd"
price: "28111CFA"
currency: XOF
in_stock: false
reviews_count: 12
url: https://www.desertcart.sn/products/409657141-wrist-trainer-ball-auto-start-gyroscopic-forearm-exerciser-gyro-ball
store_origin: SN
region: Senegal
---

# LED light visual feedback Auto-start gyroscopic core Ergonomic wrist & finger training Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles

**Brand:** jin bd
**Price:** 28111CFA
**Availability:** ❌ Out of Stock

## Summary

> 💪 Spin your way to unstoppable wrist power and flex that millennial hustle!

## Quick Answers

- **What is this?** Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles by jin bd
- **How much does it cost?** 28111CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/409657141-wrist-trainer-ball-auto-start-gyroscopic-forearm-exerciser-gyro-ball)

## Best For

- jin bd enthusiasts

## Why This Product

- Trusted jin bd brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dynamic LED Glow:** Captivating LED lights turn your workout into a sleek, stress-relieving spectacle.
- • **Compact Powerhouse:** Portable design fits in your office, gym, or commute for on-the-go strength gains.
- • **Effortless Auto-Start:** No ropes needed—just a thumb press to ignite powerful gyro resistance.
- • **Premium Quality Assurance:** Factory-tested, battery-free tech ensures smooth, durable performance every spin.
- • **Targeted Rehab & Strength:** Clinically supports carpal tunnel, RSI recovery, and boosts forearm muscle endurance.

## Overview

The JIN BD Wrist Trainer Ball is a cutting-edge gyroscopic forearm exerciser featuring an automatic start mechanism and LED lights for visual motivation. Designed to strengthen wrists, fingers, and forearm muscles, it aids in recovery from repetitive strain injuries and enhances grip strength. Compact and portable, it’s perfect for professionals seeking discreet, effective workouts anytime, anywhere—no batteries required.

## Description

desertcart.com: JIN BD Wrist Trainer Ball Auto-Start Wrist Strengthener Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Wrist Bones and Muscles with LED Light, Black : Sports & Outdoors

Review: Keep any part of your hand that can be pinched away from the moving ball, it can bite you! - It's a fun little exercise ball and it will work your forearm. The lights the ball produces when it spins are entertaining but much more so at night and/or in a dimly lit room, in a bright room the lights are barely noticeable. The instructions that came with the ball are a little vague, I ended up going to the online Google video to see how to get this ball started. Many years ago I had a Dyna-flex exerciser (I probably still do in a junk and clutter box somewhere in my house) and without reading the instructions I tried to start this ball the old Dyna-flex way, every attempt failed. I then tried reading the instructions that came with the ball, they were vague and unhelpful. I watched the video on how to start the ball which was very helpful but left out the first step. First, place the ball in the hand which you plan to exercise or to get the ball started. This will help you to get the right feel for the ball, if you wait until after the ball tries to start spinning to figure out your hand placement the inner gyroscope ball will lose all momentum as you are trying to figure it out. Second, place both thumbs on the arrows on the ball. One thumb at a time, push down and forward on the ball, alternate walking the ball in the direction of the arrows with your thumbs. In a very short time you will begin to feel tension building up on the ball, push a little further until the ball feels like it wants to spin back against you. Hold the ball in place with one thumb while you find your grip with the hand you plan to exercise. Once your working hand is in place release your thumb hold on the ball and begin working your wrist, you will know within a few seconds if the inner gyroscope ball has been activated. It took me four attempts to get this ball started the first time, it hasn't taken more than two attempts since.
Review: Effective and fun - Phenomenal and unique exercisor for wrist, hand, forearm. I use it several times a week. Easy to use and very effective. Strengthens grip and hand strength, and arm and shoulder too if you know how to use it. Still working great after 10 months.

## Features

- The product includes: JIN BD wrist ball black LED light model, brand card, ball bag, safety rope, instruction manual, gift box
- Automatic start: The upgraded version uses a built-in pre-tensioner to start, and no starting rope is required. Press the inner ball with your thumb and move your thumb in the direction of the arrow to start the internal spring. The working principle is simple and environmentally friendly. By rotating the wrist, the ball core rotates at high speed, generating centrifugal force, so that the wrist feels a certain resistance.
- Suitable for assisting: Long-term use of computers or mobile phones, carpal tunnel syndrome, repetitive stress injuries, etc. are more common. By continuously and indirectly strengthening the muscles and flexibility of the forearm and wrist joints, it can significantly improve muscle strength, flexibility, and promote blood circulation.
- Suggested Reminder: If this is your first time using the product and you still have questions or difficulties after watching the built-in instructional video, please contact customer service promptly. 📩 Our support team will assist you in real time and provide the necessary help and support.
- Exquisite Design: The Wristball can be carried anywhere, whether in the office, gym or at home, it can be used as a toy to relieve stress at any time, and it can also exercise finger grip strength training.
- A chic gift: The gyro ball is a great gift for children who love sports, restless middle-aged people and people who work in the office for a long time, guitarists, pianists and other musicians
- Quality Assurance: JIN BD Torsion Ball is rigorously tested by factory machines, warehouse inspections, and manual re-inspections. This product does not require battery power. Wrist rotation interacts with the internal ball core to generate centrifugal force to maintain efficient rotation. The faster the rotation speed, the greater the force generated.
- Tips: If the wrist strength ball you received cannot start smoothly or work properly, please contact us in time, we will help you solve the problem.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B094GXVT4C |
| Age Range (Description) | Adult |
| Best Sellers Rank | #3,264 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Gyroscopic Hand Exercise Balls |
| Brand | JIN BD |
| Brand Name | JIN BD |
| Color | Black with LED light |
| Construction Type | plastic |
| Country of Origin | China |
| Customer Reviews | 3.8 3.8 out of 5 stars (5,149) |
| Date First Available | May 10, 2021 |
| Item Dimensions LxWxH | 3.14 x 3.14 x 2.36 inches |
| Item Package Dimensions L x W x H | 3.82 x 3.78 x 3.11 inches |
| Item Weight | 290 Grams |
| Manufacturer | JIN BD |
| Material | Polyurethane |
| Number of Items | 1 |
| Outer Material | plastic |
| Package Weight | 0.34 Kilograms |
| Part Number | Gyro-V1 |
| Sport | Exercise & Fitness |
| Style | Ball |
| Unit Count | 1.0 Count |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** JIN BD
- **Color:** Black with LED light
- **Item Weight:** 290 Grams
- **Material:** Polyurethane

## Images

![Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles - Image 1](https://m.media-amazon.com/images/I/71Hax+vFIrL.jpg)
![Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles - Image 2](https://m.media-amazon.com/images/I/71RW883fp7L.jpg)
![Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles - Image 3](https://m.media-amazon.com/images/I/71Roi7lrNAL.jpg)
![Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles - Image 4](https://m.media-amazon.com/images/I/71fwsTwbHGL.jpg)
![Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles - Image 5](https://m.media-amazon.com/images/I/71hb-V6u7qL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Keep any part of your hand that can be pinched away from the moving ball, it can bite you!
*by V***E on July 8, 2025*

It's a fun little exercise ball and it will work your forearm. The lights the ball produces when it spins are entertaining but much more so at night and/or in a dimly lit room, in a bright room the lights are barely noticeable. The instructions that came with the ball are a little vague, I ended up going to the online Google video to see how to get this ball started. Many years ago I had a Dyna-flex exerciser (I probably still do in a junk and clutter box somewhere in my house) and without reading the instructions I tried to start this ball the old Dyna-flex way, every attempt failed. I then tried reading the instructions that came with the ball, they were vague and unhelpful. I watched the video on how to start the ball which was very helpful but left out the first step. First, place the ball in the hand which you plan to exercise or to get the ball started. This will help you to get the right feel for the ball, if you wait until after the ball tries to start spinning to figure out your hand placement the inner gyroscope ball will lose all momentum as you are trying to figure it out. Second, place both thumbs on the arrows on the ball. One thumb at a time, push down and forward on the ball, alternate walking the ball in the direction of the arrows with your thumbs. In a very short time you will begin to feel tension building up on the ball, push a little further until the ball feels like it wants to spin back against you. Hold the ball in place with one thumb while you find your grip with the hand you plan to exercise. Once your working hand is in place release your thumb hold on the ball and begin working your wrist, you will know within a few seconds if the inner gyroscope ball has been activated. It took me four attempts to get this ball started the first time, it hasn't taken more than two attempts since.

### ⭐⭐⭐⭐⭐ Effective and fun
*by H***J on January 19, 2026*

Phenomenal and unique exercisor for wrist, hand, forearm. I use it several times a week. Easy to use and very effective. Strengthens grip and hand strength, and arm and shoulder too if you know how to use it. Still working great after 10 months.

### ⭐⭐⭐⭐ Works Great!
*by H***N on December 4, 2025*

I've gotten into climbing this year, so I'm always looking for exercises that can improve my forearm and grip strength. A friend recommended these gyro balls to me, and after looking up different models, I decided this one would be good to try. The device comes in simple box. Inside is a card with a QR code linking to a video for how to use it, the gyro ball, a nice case for the gyro ball, and a wrist lanyard for safety. The device itself has a labeled tacky external rubber grip going across the middle third of it. The rest of the exterior is a clear plastic that feels on the cheaper side and somewhat easy to scratch, but after a day of use I haven't actually had any functional problem with it. Shaking device it has a little bit of a plastic rattle. Having never used one of these, I followed the QR code they supplied and watched the YouTube video. To get it started, the center ball of the gyro needs to be spinning, and to do that, you basically use your thumbs to rotate the ball in the direction of the arrows on it (using the grippy strips on the ball) and wind the ball until it's difficult to move. It's important to note (and not mentioned in the video), that during wind up the device must be placed horizontal initially (flat side facing down) while starting to wind up, or the winding won't catch. This is similar to wind up toy cars from when I was a kid. Then while still holding the ball in place with one hand, you place the device in your other hand, grip the exterior, and release the wound up internal ball. At that point the ball is spinning. While keeping your palm parallel to your arm, you then rotate your wrist 90 degrees along the axis of your arm, then back again, and repeatedly keep doing this. The rotational force (centripetal) is transfered to the spinning ball speeding it up, and in return you end up feeling a force (rotational inertia) resisting your movement. The faster the ball moves, the greater the resistance becomes. It took me a few tries, but I've had no problem getting it to work every time since. I saw a lot of reviews saying it doesn't work and that they were struggling, and watching the video or other ones explaining how these work is very useful. The key is small movements along a fixed rotational axis as described. While the rotation I described kicks it in quicker, you can learn to use other wrist rotations to keep it moving as well. Once the ball hits a certain speed (I think 500 rpm according to the video), you'll see rainbow lights on it and hear at speeding up. I found that as it gets really fast it can be quite loud, and I have no idea how it compares with other ones, but it doesn't bother me too much. As for effectiveness, I was really surprised how quickly I felt fatigued in my wrist, forearm near my wrist, and back of my hand closer to my wrist. I don't feel much fatigue in my fingers or anywhere else. I rock climb twice a week at a beginner level, I'm relatively fit, and when I get the ball moving near the limit of controlling it stably, I feel a surprising amount of fatigue in less than a minute currently. After that I usually carefully switch hands (so I'm not using the safety lanyard), and I alternate. Keeping it at slower speeds I can do it for longer. Overall, I'm pretty happy with this so far. I'm sure it will improve my wrist and forearm strength a bit, although I don't know about grip strength. The device seems to be working exactly as advertised, and I'm hopeful that it will continue to perform. I would say it's worth the money. And in case you were concerned like I was at some of the reviews, it would seem a lot of these devices here have mixed reviews when you sort by most recent, but when you read the reviews, they are full of people who claim the device doesn't work or they couldn't get it to work. It's possible there's quality control issues, but considering how common the complaints are even on more popular ones, it's likely people just aren't learning how to use it (which took very little time if people watch the video). Even some of the reviews for this product have videos of people getting the ball spinning, but they're improperly rotating their wrist in a way that is inconsistent with the instructional video. It's very easy to use if directions are followed.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-20*