Keyboard - brand generic - Wireless Numeric Keypad 2.4G Keyboard Extensions With Mouse For Desktop Computer Black Highlights brand generic Wireless Numeric Keypad 2.4G Keyboard Extensions With Mouse For Desktop Computer Black Description: WIRELESS CONNECTION 2 .4GHz - Using advanced 2.4GHz wireless technology, plug and play, no additional driver required. Signal transmission stability, working range up to 33 feet. (USB receiver is inserted into the keyboard's battery compartment.) ERGONOMIC DESIGN - Built-in ergonomic tilt provides comfort that helps reduce strain; Large spring action and comfortable key sizes respond quickly, improve your work efficiency, ideal for those who work on spreadsheets, accounting files or financial applications. NON-SLIP AND PORTABLE DESIGN - There are four non-slip mats on the back of the numeric keypad, which prevent it from sliding on your desk when in use. This rugged number pad is easy to take with you, so you can work confidently and quickly - wherever and wherever ENERGY SAVING - It will automatically shut off when not in use for 10 minutes, effectively increasing the battery life. UNIVERSAL COMPATIBILITY - the wireless numeric keypad works with PCs, laptops and desktop computers with Windows 2000/XP/Vista/7/8/10 systems. The 18-key wireless numeric keypad is not fully compatible with Mac OS. specification: Operating frequency: 2.4G technology Power supply: 1*AAA batteries (not included) Effective distance: about 32.8 feet (10m) Case material: ABS Keyboard size: 133*128*22mm Mouse size: 113*59*20mm Mouse Tracking System: Optical Interface(s): USB 2.0 Package Include: 1 piece Wireless Numeric Keypad 1 piece Slim Wireless Mouse 1 piece 2.4G Wireless USB Receiver Note: Color may be different slightly different due to the color calibration of each individual monitor. Please allow slight measurement deviation due to manual measurement.