VINCA DTCR-03 RS232 Data transfer cable is designed for VINCA DCLA Digital Calipers ONLY (6" 8" and 12"). It will not work with VINCA DCRA Origin Digital Calipers. Cable for PC length: 87.5"; Cable for Caliper length: 25.5". No battery needed; Powered by PC; No driver needed, cable will be identified as a keyboard. One cable per PC; One click (press the button) per transferring. Transfer delay: 1 second; Manual transfer ONLY. Does not support auto transfer. Does not include foot switch. Need to purchase separately.