Model: BK300 Bluetooth 5.0 Battery Monitor for all 6V 12V 24V lead-acid car truck starting battery Receive notification of battery conditions when enter Bluetooth range Check starting system and charging system; List the time of each driving; Alert mobile phone if some data abnormal; Review voltage history in graph mode; Short-circuit and reverse connection protection Data stored in device, support share results Ultra-low power consumption, average current: 1.0 mA; High quality clamps connect with battery directly Free app for iOS & Android users; Update hardware via Bluetooth Function: live voltage reading; live voltage reading history record Cranking test Charging test Display:via APP on Android or IOS devices Feature: testing result share via APP Average Current: 1mA Input Voltage: 3V-60V Color:black Material: ABS Package Contents: 1PCS Car Battery Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.