*Membrane tactile key switches give comfort to your fingers *System requirements:DOS5.0/WIN95/98 /NT/ME/2000/XP * Interface:AT/PS/2 USB * Available layout:107key¡¢108key¡¢109key¡¢ 110key¡¢112key¡¢ * Switch life:10 million times * Cable Length(M)£º1.0/1.2/1.4/1.6/1.8/2.0 * Working current:¡Ü20mA * Working voltage: +5V * Power£º¡Ü0.1W