Features 1、Convenient design, it supports BM2 Bluetooth 4.0 wireless monitoring, which can monitor up to 4 devices, allowing you to better control the battery condition. 2、A wide range of uses, it supports all 12V car batteries, can perform automatic detection of voltage, power, starting power, engine start, etc., free apps for iOS and for Android. 3、Smart design, it has a smart date connection function, when entering the Bluetooth range, the application will send the battery status to the mobile phone notification bar. 4、Convenient operation mode, it can be directly connected to the battery, no password is required, and it can be used directly with a scan code machine for backup or the user to manually scan the code to download the software. 5、Small size, it is lightweight and portable, can be easily installed with the battery, can be used in more situations, and help you easily monitor the battery. Specification Item Type: Battery Monitor Material: ABS+Rubber Model: BM2 Support: It is suitable for all 12V car batteries. Applicable System: for Android 4.3 and Higher, for IOS 7.1 and Higher Applicable Devices: for iPad 3 and Higher, for iPhone 4s and Higher Language: English Connection Method: Bluetooth Advanced Function: It can be installed in the car and the battery can be monitored in real time through the mobile phone APP (free app for iOS and for Android). Package List 1 x Battery Monitor Tester