product feature Switch: GATERON Blue Switch Color:Black products weight:160GR Actuation Force : 50+/-150cN Keyboard size is 127*86*42mm Keycap material: ABS plastic Package included: 1 x 21 keys mechanical gaming keyboard (Not including battery) 1 x USB Nano recriver 1 x manual See more

Package List: 1 x Keyboard(Not including battery), 1 x Nano receiever.Compatile with Win xp , Win vista, Win 7, Win 8. 2.4G Wireless keypad is suitable for laptop users,banking, financial securities, business workers or Used with 87 keyboards, 82 keyboards, 68 keyboards, 61 keyboards and other keyboards without numeric section. 21 keys enhanced mechanical numeric keypad has 17 numeric keys and extended 4 additional keys,including "tab"esc"?"and "FN". By simultaneously pressing the FN key and another key, you can input parentheses, an equal sign, currency symbols, or activate the calculator. Compare with the other standard keypad, the 21 keys extended some keys at the top, contain Esc,Tab,Back Space,and FN keys. Plug & Play. The 2.4G signal with strong and powerful connectivity can make sure that the Nano receiver instantly connect the keypad with computer's USB port.