Bluetooth wireless : Fast data transmission, and it has up to 33FT working range. Ergonomic design : High plastic Material, Slim Design Number Pad, Ergonomic tilt and anti-slip pads on back provides comfort. Multi-function 22 keys number pad: Numeric keypad supports NumLock, ESC, Tab, Delete etc. Soft touch high scissor switches : Comfortable typing- Keys , round design, are easy and silent to press. Rechargeable : Built-in rechargeable battery, single charge can use 3 months. Compatibility: Works with PC and desktop computers that have Windows 2000/ XP/ Vista/ 7/ 8/ 10 , and iOS operating systems. Colour:Green Material:plastic Package Contents: 1 x Wireless Number Pad Only the above package content, other products are not included. Note: Light reflection 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.