Mini design (20%) 21 Keys 2.4G Wireless keypad is here.Its num lock function is independent of any other keyboard that are currently connected.The mechanical switch keypad can ensure a fast response.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.Compare with the other standard keypad, the 21 keys extended some keys at the top, contain Esc,Tab,Back Space,and FN keys. 21 keys mechanical numeric 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 numberic keypad has 17 numeric keys and 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.product featureSwitch: Cherry MX Red Switchproducts weight: 160GRkey travel: 2.0mmActuation Force: 45+/-20cNKeyboard size is 127 * 86 * 42mmColour: Blackmaterial: plasticPackage Contents:1 * Wireless numeric keyboardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.