1/3/5pcs Lost Alarm Tracker 85db Finder Beeper Mini Loss Alarm Finder Buzzer AM PCM PPM for Rc Aircraft Model Helicopter _x000D_ _x000D_ Feature Small size and light weight Unique whistles help distinguish environmental noise Microprocessor control with strong anti-interference capability Using voltage: using BEC (receiver) power Size: 13 17 12 (mm) Applicable controllers: all PPM/FM, PCM/FM, AM Tx/Rx >85dB The loud alarm caught your attention Applicable to AM/FM PPM or FM/PCM R/C system Insert any standard servo channel Weight:5.3 g(including cables) Working voltage: 4-6 Volt DC Low current consumption:< 35 Milliampere (in standby mode) Alarm level: 85 Decibel Can be found in fifty Heard within meters 1. The loss alarm between the connecting servo (the one running during flight) and the receiver serves as an extension line for the servo 2. Open your transmitter 3. Turn on your receiver and you will hear two beeps 4. To test if it is working properly: Do not move any control levers on the transmitter within minutes. Or simply turn it off If you ignore continuous beeps about 2 Minute, the beep will become louder V sound 5. If you cannot find your aircraft, do not move the control lever or turn off your transmitter 1 Minutes to wait for the alarm sound 6. By tracking the sound, you will be able to locate your remote-controlled aircraft/helicopter _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_