nidici 5V Active Alarm Buzzer Super Loud Beeper Tracker 2 Terminals Electronic Continuous Sound Buzzer 5pcs 12X9.5mm and 5pcs 9X5.5mm for FPV Racing Drone RC (5V Active Alarm)

Easy to set up and they work, but I was surprised to find that they don't seem much louder than the buzzer on my ESCs (Crazepony BL_Heli32) . The red LED is quite bright, but this isn't enough reason to add it to my build.If my quad didn't already have a buzzer, these would just be "okay".

These are PERFECT. I love that they have lights too. I wasn't expecting the lights. They are also pretty loud. Has saved me a few time in tall grass.

Beeper with lights that work great. I've since been using the beeper on 3 of my quads to locate them after crashes.Beeps loud with 2 flashing ledWill need solder ironIt made locating my quads a lot easier now that I can hear them from a distance.

This buzzer works well . came in handy today when my Quadcopter got away from me . It is loud & the built on LED is a nice touch. Gonna be using one in all my drones .

Decently loud and easy to install also compact enough to have enough room in any build lights are pretty bright to

Great little buzzer just wish you could keep led on if you wanted

Needs to be way louder. Also the buzzer went out in one of them.

3 points to solder to. not terribly loud, but can be heard if you listen hard enough