Basic Features: 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. Applicable specification: for MDR 11 / 11 Pressure Switch. Maximum load current: 26 AMPS. Rated voltage: 120/240 VOLTS. Support mobiles: for All iOS and Android smart phone with Bluetooth 4.0 for iOS (for , 5, 5C, 5S and later; 2, Air, mini, mini 2 and later) for 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. Material: plastic colour: As shown Package Contents: 1 x 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.