Feature: 2.4GHz ultrathin wireless desktop/laptop keyboard & mouse. Mini size, ultra-thin, fashionable design, looks very exquisite. The mouse adopts infrared AVL technology, more accurate and fluent. The mouse has the strong adaptive surface ability, which could work fine at white, black, red, smooth surface, etc. Uses the advanced intelligence wireless networks technology, the keyboard & the mouse are not disturbed mutually. Every mouse & keyboard set has fixed networks ID. Adopting frequency hopping transmission technology, in one office it can support 32 types of equipment without disturbing each other. The mouse can automatically match with the ID, it is very convenient for use. The keyboard can be auto into sleep when idle. When taking out the battery, the mouse can release the code matching. Specifications: Wireless carrier frequency: 2402~2480MHZ Wireless channel: 16 (automatic hopping) USB ultra For NANO receiver: 2m Material: ABS Color: As the picture show Keyboard battery: 3 * AAA batteries (not included) Mouse battery: 2 * AAA batteries (not included) Working current of mouse: 3V=10MA Working current of keyboard: 3V=3MA Mouse Size: 113*57*23mm Attention: 1. Please do not keep the Bluetooth device close to the 2.4Ghz receiver. 2. A wireless transmitter can generate an electromagnetic signal, a pacemaker body related auxiliary instrument please use in caution. 3. Rough interface and reflective medium will affect the performance of the mouse. 4. Do not try to disassemble the device. 5. Long-term when not in use, please remove the battery or take the switch to off states. 6. Please use the soft and dry cotton to clean the device.