This is a kind of high precision current type battery capacity tester(also known as coulometer),which can test the voltage,current and capacity of battery to help users know the state of battery in time. Support serial communication, standard Modbus protocol. Overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, low battery alarm. Delayed conduction, forced conduction. UPS uninterruptible power supply mode. Note: due to different production batches, the printing screen printing/appearance is different, which does not affect the use. Parameters: Battery voltage range: 10-110V Adapter input voltage range: 10-110V Maximum current: 10A Voltage accuracy: ±0.5%+1 character Current accuracy: ±0.5%+3 characters Current resolution: 0.01A Voltage resolution: 0.01V Operating temperature: -10-60°C Color: As Shown Material: plastic Package Contents: 1 * Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.