BM2 WIRELESS BT BATTERY MONITOR Compatible with Android and Apple BM2 App. The BM2 12V Wireless BT battery monitor is a compact diagnostic tool designed for monitoring the health of 12V vehicle and motorcycle batteries. It connects wirelessly to Android and iOS devices via Bluetooth, providing real-time data on battery voltage, cranking performance, and charging status through a mobile app. With ultra-low power consumption (1.5mA), multilingual support, and built-in prot Specification Receive notification of battery conditions when enter wireless BT range. Check vehicle cranking system automatically. List the time of each driving; Sends alerts through the App if some data abnormal. Short-circuit and reverse connection protections. Data stored in device up to 31days if out of sync. Ultra-low power consumption, average current: 1.5 mA. Compatible with all 12-volt vehicle batteries. Free app for iOS & Android users. Input voltage: 9-20V. Operating Temperature: -40-90°C. Dimensions: 55x35x16mm. Manufacturer Cellink Bluetooth v4.0