Ultra Thin, Say Goodbye to Bulky! Small and portable, easy to store and save space, a good business travel companion. 2.4G Wireless Numeric Keypad Extensions for Data Entry in Excel, Suitable for business people, accounting, securities, banks, etc. Comfortable feel, quick rebound, suitable for long time typing, 15 stereo ergonomic angle, relax your hands during use. Ergonomic tilt and anti-slip pads on back provides optimum comfort. Good resilience fast response and reduce the press sound, allows quiet typing and avoid disturbing others. Ideal for evening work, travel, school, library, etc. Compatible with Windows 2000/Me/98/XP/Vista/7/ 8/10, Android, Samsung, Surface Pro 3, Pro 4, Android Cellphone Tablet PC Laptop Desktop etc. Power Supply by 1 x AAA Battery ( Not Included ) Specification Product size: 14 * 8.5 * 2 cm Color includes: black, gold Connection: USB2.4G Wireless Transmitting distance: 10 meters Material: high quality ABS material Power supply: AAA7 battery 1.5V (battery not included) Package includes: 1pc * Numeric Keypad