Features& 65306; Normal Trigger Mode: In the normal trigger mode, the instrument automatically tests the internal resistance and vol tage of the battery then send to RS232 serial port. External Trigger Mode: Input low-level trigger pulse signal from BNC socket on the back of the instrument, The low-level time of the trigger signal is greater than 20ms,and the instrument tests once for each pulse, send the measurement results to RS232 port after measurement. Large LCD Display Screen: This battery tester with large LCD display screen and backlight, you can turn on the backlight as needed. Two Communication Transmission Format: The String modes is sends measurement results in ASCII format and the another mode is sends measurement results in hexadecimal format. Automatic shutdown: The machine can be set to shut down automatically without any operation for 20-120 minutes. Save Battery: With this tool, you can test battery voltage and resistance to determine whether the capacity of the battery is low or highly and keep you from wasting perfectly batteries. Specifications: Material: ABS Communication baud rate: 115200bps Stop bit: 1 Parity: none Format: BF, AA, Vn, Vn+1, Vn+2, Vn+3, FF, EF Adapter: EUPlug Package size: 250 * 180 * 90mm / 9.8 * 7.1 * 3.5in Package weight: 1263g / 2.8lb Packing list: 1 * Battery Tester 1 * Adapter with Plug 1 * Pair Testing Pen