About this item Upgraded Version Keypad: Compared to our ordinary Version keypad, it supports NumLock, ESC, Tab, Delete etc. With shortcut key which can open the computer calculator directly, great accessory for Small Laptops Without A Separate Keypad. Bluetooth 3.0 Connection: Bluetooth 3.0 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). Power Saving : Power Supply by 1* AAA Battery not included ; It enters into sleep mode automatically, energy saving, extended battery life; Any key to awake up the keypad. USER FRIENDLY : Full-size 22 keys, comfortable typing precise control, good resilience fast response and reduce the press sound, Give Quiet Office Operation & Long-Life. Wide compatibility :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).