Features 1、[Real Time Monitoring] This coulometer provides real time display of voltage, current, power, remaining capacity, and usage time, offering comprehensive and clear data on its low power LCD screen. 2、[Convenient Hall Sensor] Equipped with a Hall sensor, this battery monitor allows for easy wiring, enabling bi directional current detection for charging and discharging. 3、[Bluetooth Connection] This battery meter allows you to view all relevant data and curves, as well as set parameters and operate functions through WeChat mini program. 4、[Reliable Material] Encased in ABS material, this monitor exhibits high impact resistance and is capable of withstanding low temperatures, ensuring safety and reliability. 5、[Wide Application] This battery tester is suitable for monitoring output voltage, current, battery charging, and discharging in various applications that require accurate battery monitoring and control. Specification Item Type: Battery Monitor Material: ABS Package List 1 x Battery Monitor 1 x Hall Sensor 1 x 3 Meter Shielded Cable 1 x 50cm x H2.54 Red and Black Wire 1 x Flat Cable 1 x Instruction Manual