【Upgraded Version Keypad】 : Compared to our ordinary Version keypad, it supports NumLock, ESC, Backspace, Del 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, the external 10-keys full keypad extends your existing keyboard, operating distance 10m. | 【Power Saving:】 Power Supply by 2* AAA Batteries【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, soft buttons for this Multi-Function wireless Number Pad. Keys are easy and less noise to press, greatly speed up your productivity. Ergonomic tilt and anti-slip pads on back provides optimum comfort. | 【COMPATIBILITY】 :Compatible with Windows 98SE /ME /2000 /XP /Vista /7/10, 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).