Description 1. Alert users if charge is low. 2. Review charge history in graph mode. 3. Show the state of charge of battery in real time. 4. Near-Filled perception to get notification automatically. Support mobiles: All iOS and Android smart phone with Bluetooth 4.0 iOS (,5, 5C, 5S and later; 2, Air, mini, mini 2 and later) Android: at least Android 4.3 (support for Bluetooth 4.0 phones) Vehicle Coverage: All 12V batteries, including motorcycle, car, SUVs, MPVs, light trucks, trucks, and boats. Including the Lead-Acid, , GEL, EPB batteries. Product Name: Battery Monitor Bluetooth Version:4.2 Bluetooth Name:BM6 Input Voltage:DC 6V - 20V Voltage Accuracy (9V-16V):0.03V Average Working Current:1.5mA Working Temperature:-40C-90C (-40F-194F) Reverse Connection Protection:Built in Short-circuit Protection:Built in Waterproof:IP67 Currently supported languages:English, Russian, German and Chinese Colour:Transparent Material:plastic Size:Physical Dimensions:(L)55mm x (W)41mm x (H)12.5mm Package Contents: 1 * Battery Tester 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.