How do I switch it to Amateur frequencies?

This is a GMRS only radio. It will not change to the amateur frequencies. There are other radios from QYT as well as B-tech that will allow access to amateur bands as well as GMRS frequencies. However this radios at not FCC approved for use on FRS and GMRS frequencies

speaker output- is the audio output a normal jack or something special? a 1/4" jack?

Believe or is a normal audio out Jack

Which Antenna does it use?

A Dual Band Antenna Patriot or Cushcraft. Some of the GMRS channels have been blocked in this model.

what would i buy to plug this in to an AC adapter at home instead of vehicle?

Will need to buy a power converter. 12 volt DC to 110/120 volt aC

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KT-8900

Product ID: 373544594

Details

Brand
QYT
Color
Black
Frequency Range
462.55 - - -
Item Weight
14.4 ounces
Number of Channels
200
Product Dimensions
4.65"D x x

📡25W max output power

📻Dual-band VHF/UHF frequencies

🔒CTCSS/DCS privacy codes

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Description

🚀 Elevate your comms game with KT-8900 — where power meets precision!

PRIVACY ON DEMAND - Advanced CTCSS/DCS codes block unwanted chatter—your conversations stay yours.
STAY WEATHER READY - Integrated NOAA weather scan and alert keep you informed and ahead of the storm.
DUAL BAND VERSATILITY - Seamlessly switch between VHF (136-174MHz) and UHF (400-480MHz) for ultimate frequency flexibility.
POWER YOUR CONNECTION - Robust 25W output ensures crystal-clear communication up to 12 miles—stay connected beyond the horizon.
BUILT FOR THE ROAD WARRIORS - Compact, lightweight design perfect for off-roaders, RV adventurers, and professional communicators alike.

The QYT KT-8900 is a high-performance 25-watt GMRS mobile two-way radio featuring dual-band VHF/UHF operation, 200 channels including 15 GMRS and 8 repeater channels, and advanced privacy codes (CTCSS/DCS). Designed for professional and personal use, it offers up to 12 miles of reliable range, NOAA weather alerts, and a compact form factor ideal for vehicles and outdoor adventures. Note: antenna sold separately; compatible with Windows versions below Win11.

Specifications

ASIN	B09G962T3J
Additional Features	Lightweight / Dual Band / Noise Reduction / CARRIER / CTCSS / DCS / 5Tone / 2Tone / DTMF /ANI
Best Sellers Rank	#394 in Portable FRS Two-Way Radios
Brand	QYT
Built-In Media	1x 2.8 ft DC Cable with Cigarette Plug Connector, 1x Microphone with DTMF Keypad, 1x Mobile Transceiver, 1x Mounting Bracket(Fuse and Screws included), Cable
Color	Black
Compatible Devices	Devices with VHF and UHF frequency range and compatible output power
Connectivity Protocol	DTMF
Customer Reviews	4.1 4.1 out of 5 stars (55)
Frequency Range	462.55 - 462.725MHz, 462.5625 - 462.7125MHz, 467.55 - 467.725MHz
Impedance	50 ohm
Item Dimensions D x W x H	4.65"D x 3.86"W x 1.38"H
Item Type Name	Two Way Radios
Item Weight	14.4 ounces
Manufacturer	QYT
Mfr Part Number	KT-8900-BLACK
Model Number	KT-8900-BLACK
Number of Channels	200
Talking Range Maximum	12 mile
Temperature Range	-5℉ to 140℉ °F
Tuner Type	UHF
UPC	717977012829
Unit Count	1 Count
Voltage	13.8 volts_of_direct_current
Warranty Description	3 months warranty
Water Resistance Level	Not Water Resistant

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134414CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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