Features
Basically, It enables you to monitor the on-board battery voltage.
This is a wireless battery voltage checker/alarm, allowingconstant
monitoringof your battery supply from any distance while in flight, even when other noisy models are flying, you'll still be able to here an audible alarm if the battery goes below a set limit.
It contains two modules, a TX and RX. The TX is mounted on board (on the aircraft), and when the monitored battery voltage goes low, then the RX (mounted in asuitableposition near to you on the ground) will give out an alarm.