** SPECIAL PRICE **仅适用于在有限的时间，这款产品只适用于美国的$ 19日！
This is a great, simple and easy to use telemetry system.
I use it in my ep boat, I'd placed it in a small plastic box for protection.
A piece of velcro to keep it in place.
When I see the boat as a small dot, it still works fantastic.
I never go that far on a lake, but for testing I'd gave it a try.
Good product!7-19-2016: Great product, EXCEPT, that the Tx's bind button broke on two of my sets after a year of use. Avoid using the bind switch unnecessarily; do your binding OUTSIDE of your aircraft so you can see what you're doing. Make sure you KNOW the binding sequence so you don't make mistakes. Finally, press the button gently...........just enough to activate it and no more.
Finally, make sure you add a dab of silicone to the antenna as a strain relief.Works like charm. Cheap. Highly recommended. Take care: the even cheaper 915 MHz version is NOT allowed in Europe, because of interference with cell phones.this is a must have Telemetry. And its perfectThis device is a simple, handy, help for flight safety, but because the broadcast is not stable, need to find open positions in the battery compartment can be very effective.A friend and I both have the cheaper version of this product purchased from HobbyKing. Both has very poor performance. It will lose connection after about 50 feet and beyond that, it's very sporadic. It's only useful on a close fly-by. In all other distance, it's useless. I may try this more expensive one but I'm not hopeful.I ordered this when it was on "Special" and never received it. Don't try the CHAT function in the hope that you'll ever get anywhere because you won't... Its all show and typically Chinese thinking as long as the money is taken in and no-one complains, it'll be all OK. NOT at ALL impressed...Works well as promised. Range is decent too. Too bad no visual/audible alarm only vibration function.I use these for all my electric aircraft, I hang it off my transmitter handle and it vibrates the Tx enough I can hear it. I don't even turn my timer on anymore.
When it goes off I just back off the throttle finish my circuit and land and the batteries are normally at 3.8 volts per cell.
I recommend to all electric aircraft flyers.Work as should and I am getting around 300m range in an urban environment