Main Functions: 1.Receives notifications of battery conditions in Bluetooth range. 2.Checks vehicle cranking system automatically while engine is starting. 3.Checks charging system (alternator) 4.Lists the time of each driving. 5.Alerts mobile phone if detects abnormal data. 6.Short-circuit and reverse connection protection. 7.Data stored in battery monitor up to 35 days if out of sync. 8.Automatic synchronization when in Bluetooth range. 9.Compatible with all 12V vehicle batteries. 10.Shows historical data graphically. 11.Engine starting detection automatically. 12.Free app for iOS and Android. Vehicle Coverage All 12V batteries, including motorcycle, car, SUVs, MPVs, light trucks, trucks, and boats. Including the Lead-Acid, , GEL, EPB batteries. Specifications: 1. Product Name: Battery Monitor 2. Bluetooth Version: 4.2 3. Bluetooth Name: BM6 4. Input Voltage: DC 6V ~ 20V 5. Voltage Accuracy (9V~16V): 0.03V 6. Average Working Current: 1.5mA 7. Working Temperature: -40C~90C (-40F~194F) 8. Reverse Connection Protection: Built in 9. Short-circuit Protection: Built in 10. Waterproof: IP67 11.Currently supported languages: English, Russian, German and Chinese Use of BM6 Notice: 1. Install the device correctly (blinking blue) 2. Open the APP and allow permission 3. Click Add device, wait a few seconds, automatically search for the attached device (or manually input the serial number pasted on the back of the product) 4. Select the device, click Next, wait a few seconds, it automatically connect to Bluetooth 5. If the connection is successful, the product can be used normally (if the Bluetooth connection fails, please turn off the Bluetooth, open the APP and try again) Color:As Shown Material: ABS Package Contents: 1PCS 12V 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.