Bluetooth Technology Powerd by Lithium BT PRO. This App is only for Lithium BT PRO Lithium LiFePO4 battery which based on bluetooth 4.0 BLE technology. This App provides comprehensive monitoring for Lithium BT PRO batteries, including: 1. SOC% using Hall effect sensing 2. Battery pack voltage 3. Amp meter - charge and discharge current 4. Battery Management MOSFET temperature 5. Individual Cell Status with balancing indicators 6. Connectivity distance up to 10 meters.