Detailed Product Description Adopt advanced COB (Chip on Board) technology for PCBCompatible with Windows9X/2000/XP, support multi-language Waterproof and Dust proof, safe and durable, power savingMade of ABS material, silent switch feeling,Operation temperature 0 to 50 degreeWorking humidity 25% to 85%Suitable port USB/PS2/AT/U+PLife-span of Operation 10000000 timesKey numbers: 107/108/109/110/ ...