Features: 1.The external numeric keyboard allows you to get rid of the problem of slow input numbers. 2.Such keypad does not take up much space, and the 2.4G wireless design can make the desktop look more stylish. And exquisite keys can fit your laptop perfectly. 3.Using 2.4G technology, you only need to plug the for nano receiver into the USB port to enjoy fast and stable signal transmission. 4.Lightweight, USB keyboard's perfect size fits into a laptop bag, which can be easy to carry on the go. 5.Excellent elasticity and comfortable button size enable fast and soft typing without losing any buttons, making it an impeccable product. Ergonomic tilt angle make such numeric keypad can be used comfortably for a long time. specification:Item Type: Keyboard Battery Type: One AAA battery (Not included) Battery Capacity: 150mAh Type: Numeric keypad Number of Keys: 18 Interface: USB Applicable Models: General Color: White / Black (optional) Size: Approx. 85 x 133mm / 3.35 x 5.24in PackageList:1 x Keyboard1 x For Bluetooth Receiver