... connect to the PS/2 mouse port or the serial (RS232) port of PC, easy to use. Produced ... no condensationPowerDC5V, 300mACubage215mm×64mm×65mmWeight700gInterface PS/2 or RS232,accommodate-selfData StandardISO/IBMPull speed10cm/s100cm/sMagnetic head life500 ... no condensationPowerDC5V, 300mACubage148mm×108mm×85mmWeight300gInterface PS/2 or RS232,accommodate-selfLife of key button1,000,000 timesLCD ...