1. Functions: (1) Display: LCD meter, english panel. (2) Control: SCM control, panel setting. (3) Stop automatically: time reach, capacity reach, protect V reach, Activation times reach, stop charge/discharge automatically. (4) Alarm and protection: Alarm against to unusual voltage and high temperature. (5) Inquire record: storage 4 sets of data in machine. (6) External data storage: USD and RS232 ports. Storage data to computer via RS232 directly. (7) Data processing: The data can be change to some graphs by matched software. (8) Working schema: constant current discharge, intelligent 3 stages charge, cycle charge/discharge, battery activate. (9) Voltage and current display value calibration (10) Misconnection protection: When it is wrong connect cable with battery "+" and "-", it will prompt battery do not connect or low voltage, which wont broke the machine.