The sensor is easily installed; attach the sensing pins to the main battery or power distribution board and plug the 3 pin connector into the telemetry port on a compatible FlySky receiver. That's it, you'll have a real time voltage readout on your transmitter. You can then configure low voltage alarms to tell you when to land if you wish. The sensor is compact and lightweight, so it'll be no problem using it on small quads.
Small compact sensor
Great for monitoring battery voltage, no need to set timers anymore