Smart BatteryProtect disconnects the battery from the less important consumers before it is fully discharged (which would damage it) or before it no longer has enough energy to start the engine. The on/off input can be used as a system on/off switch. By using Bluetooth to programme the Smart BatteryProtect, all required on/off thresholds can be set. Alternatively, one of nine preset on/off thresholds can be set using the programming pin.