IMAX SIGNAL LOSS ALARM 5-6V SK-600073-01

The Signal Loss Alarm & Lost Aircraft Finder is controlled by a tiny MCU. As simple device, it can be plugged into any servo/RX port, will detect the loss of TX signal and emit a loud 85dB alarm. Ideal for warning you if you have not turned off your RX power supply while in the pits, or if you are having trouble finding a model in the long grass, simply turn off your TX the alarm will sound and the red LED will start to blink! With its versatility and small size, the Signal Loss Alarm & Lost Aircraft Finder is a "must-have" accessory for fliers. 

If you don't want the alarm to beep after one minute. You can disable one minute TX inactive warning by simply move the switch to mode 2.