88Keys,392*135mm,it is applicable to data input of all the self-service terminals. Anti-vandal designing,outdoor&public places are all applicable. Resistant to most individual solvents and cleaning agents. It could be provide PS/2 or USB connector. Materials Front Panel Brushed Stainless Steel Keys Brushed Stainless Steel Trackball Brushed Stainless Steel Mounting Pack Aluminum Alloy Electrical Power Supply Voltage 5.0VDC+/-5% Current Rating 10mA Trackball Resolution X竊�gt;400dpi Y竊�gt;380dpi Interface PS/2 OR USB Environmental Operating Temperature 0��+45��br />Storage Temperature -30��+70��br />Operating Relative Humidity 30~95% Mechanical Operational Life:�� million cycle actuations Stroke Travel 2mm Actuating Force 120g Lettering Etching with strong printing ink Weight 2.0kg Reliability MIBF:>2000h MTTR:<30min