FrSky voltage sensor, FBVS-01

FrSky Battery Voltage Sensor is provided as Two Way Telemetry System’s Optional Accessory. There are three voltage ranges to choose: 1S lipo for battery voltage range from 0V~6.6V, up to 3S lipo for 0V~13.2V and up to 5S lipo for 0V~19.8V.