Works with all 12V batteries. Wireless (Bluetooth 4.0) within 10 meters. Software included for Android and iOS. Receives notifications of battery conditions within Bluetooth range. Checks vehicle cranking system automatically while engine is starting. Checks charging system (alternator). Logs the duration of each drive. Sends alerts to mobile phone if abnormal data is detected. Short-circuit and reverse connection protection. Data stored in battery monitor for up to 35 days if out of sync. Automatic synchronization when in Bluetooth range. Compatible with all 12V vehicle batteries. Displays historical data graphically. Engine start detection performed automatically. Free app available for iOS and Android. Color: Black Material: Plastic Package Contents: 1 x Battery Monitor BM2 Bluetooth 4.0 Device Car 12V Battery Tester Only the above package content, other products are not included. Note: Lighting and display differences may cause slight variation in color between image and actual item. Measurement error allowance is +/- 1-3 cm.