Bluetooth 5.1 Battery Tester BT15 12V/24V Auto Cranking & Charging System tester
BT15 Professional Battery Tester. 1 × BT15 Battery Tester (Main unit + test cables). 6V-30V · Bluetooth 5.1 · STD/AGM/GEL/EFB. Bluetooth 5.1. BATTERY TYPES. Open Bluetooth on phone and launch the official APP.