Signal loss Alarm & Lost Plane Finder

Description:
Signal loss Alarm & Lost Plane Finder simple device that plugs 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 and within a minute, the alarm will sound!
Specification:
Weight: 4.5g
Operating Voltage: 4v~6v
Current Drain: 1~35mAh