ANCEL BM300 is designed for all 12v batteries, which supports voltage test, cranking test, charging test and trip recording via Bluetooth connection by App ANCEL Battery Monitor. And it is compatible for vehicles, motorcycles, boats, SUVs, etc.Ancel BM300 Bluetooth 4.0 Battery Tester Feature:Support: All 12V Car BatteryAvailable:Android 4.3 and LaterIOS: IOS 7.1 and LateriPhone: 4s and LateriPad: iPad 3 and LaterLanguage:English, Simplified ChineseConnection method:Bluetooth 4.0App Name: Ancel BM300, please scan machine backup or user manual scan code, download software.Ancel BM300 Bluetooth 4.0 Battery Tester Advanced Features:Installed in the car battery Real-time Monitoring Through Mobile Phone App.List the time of each drivingEngine starting detect automaticallyReceive notification of battery conditions when enter Bluetooth rangeShow voltage & charge info. when user is close to the vehicle,no need open appAutomatic synchronization when enter Bluetooth rangeData stored in battery monitor up to 35 days if out of syncAlert mobile phone if some data abnormalCheck starting(cranking) system when each time engine startedCheck starting voltage each hundredth of a second when engine is startingReview historical data graphicallyProtection of short-circuit and reverse connectionHow to Use it1.Install the Device on Car Battetry.2.Scan the Device QR Code 3.Download the APP4.Start Diagnosis