1、Industrial Grade ABS Material: This battery monitor is made of industrial grade ABS material, which is impact resistant and low temperature resistant. 2、Hall Sensor: This battery monitor meter uses hall sensor, no need to break the line, it is easy to wire charging and discharging bidirectional current detection, replacing the open ended transformer is optional features. 3、Wireless Connection: This digital voltmeter ammeter supports bluetooth connection, you can view all the relevant data and curves and set parameters and operate relevant functions through the bluetooth connection on for WeChat applet. 4、Multifunctional: This electricity AH voltage meter is multifunctional and can display real time voltage, real time current, real time power, residual capacity, and usage time of many physical parameters. 5、LCD Display: This electricity AH voltage meter uses a liquid crystal display screen which shows the data comprehensively and clearly. Item Type: Wired Hall Coulometer Material: ABS 1 x Wired Hall Coulometer Display 1 x Hall Sensor 1 x 3m Shielded Cable 1 x 50cmxH2.54 Red And Black Wire 1 x Cable 1 x Manual