Features: 100% brand new and high qualityBluetooth-compatible technology provides a cable-free clutter-free connection, very stable and reliable, no device drivers needed, no delays and dropouts, fast data transmission, operating distance 10m(Note: No USB Adapter Needed).Full-size 22 keys, comfortable typing precise control, good resilience fast response and reduce the press sound, Give Quiet Office Operation Long-Life.Numeric Keypad supports (),= , Tab, Delete etc.Integrated ergonomic tilt provides extra comfort that helps reduce strain, great for those working on spreadsheets, accounting files or financial applications.Compatible with Windows 98SE /ME /2000 /XP /Vista /7/10, Mac OS X 10.6 higher, Linux 2.4 or above operating systems. Numeric keypad is not fully compatible with Mac system (Function keys do not work, while number keys part works fine). Package Includes: 1PC x Numeric Keypad Specifications: Keys Number: 22 keyMaterial: ABSColour: black, green, pink, whiteSize: approx. 131.5x88.8x19.72mm/5.18x3.5x0.78in note: No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you