FEATUREBlack body ergonomic design; Sleep/Wake up/Power 3 function keys;SPECIFICATIONInterface: USBMaterial: HIPSCable length:1900 ± 10 mmKeystroke life:10 million timesInput power: 5 ± 0.25 vForce:55 g ± 8 gReturn force:; 20 gKeycaps pull force:; 1.5 kgEST test SPE: Touch: 8KV Un-touch:12KVMaterial: HIPSDimension (WxLxH):6?x18?x1?Weight:595gColor: blackLanguage: EnglishSystem requirements: Microsoft Windows98/ 2000/ ME/ XP/ Vista/ 7Certification: CE, FCC, WHQL