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  • 02/07/2020

    works perfect on my planes. alarm is loud and clear. when you hear the alarm, you now you have to land immidiatly!

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  • 10/12/2020

    Excellent solution for RC models of mid-range aircraft!

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  • 11/03/2021

    Very strong sound alarm.

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  • 05/07/2016

    - Charge level alert (3.3v/Cell) is to low. 3.7v/Cell would be better for me. - On the other hand we have a good size (33mm x 19.6mm ), weight (4.5g) and a user friendly tool : Battery < 3.37v : the corresponding LED will flash red light quickly and beeps. 3.37v > Battery < 4.3v : the corresponding LED will adhere to the green, but no beep. Battery > 4.3v : the corresponding LED will be flashing red light slowly and beeps. Thanks

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  • 03/10/2016

    Il prodotto è conforme alla descrizione: è molto piccolo e leggero e il cicalino (buzzer) è discretamente forte, sebbene sia singolo. Lo tengo attaccato col biadesivo al mio HUBSAN H501S per cadute accidentali e facilitare la ricerca e anche per controllare ad orecchio lo stato della batteria e ritornare al punto di partenza. Consigliato

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  • 04/02/2019

    Just got this in today. It works great and does what it says in the description. This is going to come in handy, now i won't have to just rely on setting a timer every time.

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  • 16/10/2018

    É o segundo que eu compro é fantástico a campainha para avisar quanto tempo você tem de bateria e funciona muito bem recomendo para quem faz voo ou pilota carro de controle remoto.

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  • 24/06/2017

    Микроконтроллер соответствует описанию пришел в работоспособном состоянии, посылка дошла до Новосибирска за 14 дней + отдельно брал трек номер за 75 руб

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  • 30/05/2017

    Заказал 04,05 получил 20,05. Номер отслеживался. Индикатор работает, пищалка пищит, светодиоды горят

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  • 28/01/2017

    This tiny buzzer is simply a must-have on your racing drone or just any flying rc model. It's super compact and super sturdy, even the pins are well protected against shock or fall damage, i've also crashed into water with my drone and this still worked perfectly after that (although it is NOT waterproof so do not submerge it on purpose). It connects to the balancer cable on your lipo (up to 3S due to the number of pins). As soon as you connect it you will hear a powerful "beep" that'll give you an idea about how loud this thing is. You can clearly hear it even when flying meters of distance at full throttle. As soon as the battery reaches the low voltage limit it'll start an intermittent beep. I have to say it is pretty well accurate about charge level reading because on my 3S Tarot FPV racer, once this alarm sets off i'll have about 30 seconds to land before experiencing a power loss great enough to render my drone impossible to fly. This might sound a small time bu it is actually really enough to bring your model back and land safely. The only thing i don't really like about this it's that the pins are "free" and there's no connector, so you have to be extra careful while connecting your battery to match the polarity (+ and -) that is printed on the circuit next to the pins. No big deal but the problem is the +/- order is printed only on one side of the little board, so if you happen to mount it "face down" like i had to do just keep in mind you'll need a way to correctly mark the pins so that you won't cause reverse polarity damage. Overall, it's cheap, light, resistent and does its job really well.

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