HIGHLIGHT [ Stable Connection ] - USB 2.0 Wired / Wirele technology, Plug and Play, no device drivers, signal transmiion stability, no delay number pad, TPE - protecting cord, the maximum working 1.25m [ Compatible ] - Numeric Keypad compatible with Android Tablet PC, Linux, Desktop, Chromebook Windows XP / Vista / 7 / 8 / 10 series. [ Full-Size 18 Keys Keypad ] - Profeional 18 full-size and concave 10 keys design, applicated in sock, notebook computer, banking, school, company etc. Numeric Keypads keycaps life of more than 10 million times [ Ergonomic Design ] - ABS Material, Small, Slim design, Numeric Keypad is easy to take with you, 10 Keys USB number pad are easy and silent to pre, Ergonomic tilt and anti-slip pads on back provides optimum comfort [ Power Saving ] - No battery required, It enters into hibernation/sleep mode automatically, energy saving, extended service life, don't have to worry about your Numeric Keypad for laptop will be no power SPECIFICATION -- 2.4G Wirele Chocolate Small Numeric Keypad -- Key life: more than 10 million times -- Battery: 1.5 V -- Product Size: 140* 86 * 20 mm -- Net weight: 85g bare metal (excluding packaging weight) with packaging 102g -- Support system: windowns98 / 95 / NT / ME / 2000 / XP / Vista / 7.0 / 8.0