innovative design reduces stress on your fingers and eliminates unnecessary finger drag pointsdecked with advanced optical sensor for maximum tracking accuracyadjustable dpi will improve your level and ensure bringing you a powerful performanceultra-durable and faster responsive keys ensure optimum stroke resiliencestaunch construction renders high wear resistance and long service life cable length:150 cminterface:usb 2.0number of key:35material:abs, aluminum and alloyresponse speed:0.01scolour name:blackcountry of origin:chinamodel number:j100product height:18 cmproduct length:25 cmproduct weight:0.448 kgproduct width/depth:4 cm