Specification: 1) Size(mm)：119*65*37 2) Weight(kg)：0.093 3) Resolution(dpi)：600-800 4) Key-press life：150Million 5) Scan speed:1500-3000/s 6) Compatible with windows 95/98/Me/NT4.0/2000/XP 7) Connector: USB Only 8) Automatic temperature control 9) Power Consumption: DC5V 350mA 10)Temperature: 30-50 Degree Centigrade 11)Turn on or off the switch to control the temperature