SpeedyBee FPV Drone Buzzer, Alarm Beeper with Internal Battery Beacon LED 110dB Alarm for F405 F7 Flight Controller GPS Tracker FPV Drone Airplane

Work as intended, really loud beeper. Only draw back is turning it off after every flight. Happy with this purchase.

Bueno, hace lo que tiene que hacer

Im not sure how or why it happened but I bought one it came in the mail and looked fine, soldered it to the speedy bee f405 v3 fc stack and seen the button on the side so i held it down and it made a continuous long drawn out beep till it killed the tiny battery it came with, so I deconstructed it a little taking the clear shrink wrap and desoldering battery off and powered it straight from the fc on the proper pads now it works fine and can control it completely using beta flight, maybe mine was just a bad fluke, just glad i know how to solder.

It’s technically a beeper, but… The unit I received emits a tone so quiet that in most situations it’s useless. On my other drone I ran a VIFLY Finder 2, which was loud enough to genuinely help me find a crashed quad, but I couldn’t find one on Amazon at a reasonable price, so I decided to try this SpeedyBee model. And yes, it is technically a beeper: wired up correctly, it can be turned on and off over RC, it charges, and most importantly, it activates automatically on power loss. None of that matters if you can’t hear it. I haven’t taken any formal measurements, but the couple of times I’ve crashed and actually needed it, the tone was nearly inaudible from more than 30 feet away outdoors. As a way to find a crashed drone, that’s hardly adequate. Technically it’s better than no beeper at all — it might help if your quad goes down in tall grass and you already know which patch it’s in — but the only situation where I’d recommend it is if ten bucks doesn’t matter much to you and you just want SOMETHING on the drone while you wait for a better beeper. It’s possible I got a defective unit, but everything seems to function fine, just quieter than expected. Many other reviews say it’s loud, but most of those are from a couple of years ago, so I wonder if something about how these are made has changed.

Easy to install and so far works pretty well. I’ve took a few crashes as well and still functions.

The module transmits a very large tone when activated. Good buy.

This little beeper can be a life saver for finding a lost drone. GOS or drone footage can get you close to the last known location, but sometimes actually spotting it can be a real challenge. Dead battery, drone busted, gps lost, whatever it is, this thing will still work. Whenever the battery is removed for to long it will go off. To get it to stop, simply replug the battery briefly or press the button on it. With its battery backup and screaming beeper someone somewhere will certainly find the dang thing. The beeper is EXTREMELY loud and I wouldn’t want this to go off inside your home. I also personally wouldn’t use this as your primary buzzer because it’s east piercing loud. It’s fairly easy to install and wire up, I think you can even omit the buzzer- and just wire 5V and ground. Overall it’s a great inclusion for any quad where you might be worried about losing the it.

MUST BE USED W FLIGHT CONTROLLER. You cannot plug this directly into a spare pwm port on a standard RC receiver. I was hoping to use this to find a flyaway plane but you cannot. If you assign it to a channel on your tx, you can trigger the alarm remotely and it will turn on w a crash where battery is ejected BUT, you cannot turn the buzzer off once turned on w the assigned switch. This means if you accidentally hit the switch on your tx while flying or on the bench, the alarm starts and will not turn off or reset unless you physically hold down the button on the unit. Lame. My last beacon can be turned on AND off w an assigned switch, I was hoping this one would too but I found out too late that it is designed to take signal from a buzzer port on a flight controller.

Not even close to 50 db. Same sound as the motors do.