Bewinner 18 Keys Numeric Keyboard - 2.4GHz Wireless USB Ergonomic

How to Use: Plug and play. Specification: Item Type: Numeric Keyboard Material: ABS Key Life: More Than 10 Million Times Type: 2.4GHz Key: 18 Keys Product Size: Approx. 140 x 86 x 20mm / 5.5 x 3.4 x 0.8in Battery: 1 x AAA Battery (Excluding) Interface: USB Package List: 1 x Numeric Keyboard 1 x USB Receiver Note: The device is delivered without batteries.