Uses the advanced intelligence wireless network protocol, the keyboard & the mouse are not disturbed mutually. Every mouse & keyboard set has fixed network ID. Adopting frequency hopping transmission technology, in one office it can support 32 equipments without to disturb 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 put off the battery, the mouse can release the code matching. Specifications: Main color: White + Silver Keyboard battery: 3 * A AA batteries (not included) Mouse battery: 2 * AAA batteries (not included) Keyboard size: 28 * 11.5 * 0.5cm Keyboard weight: 300g Mouse size: 11.5 * 6 * 1cm Mouse weight: 50g Package size: 38.5 * 14 * 3cm Package weight: 509g Package including: 1 * Wireless Desktop Keyboard 1 * Wireless Desktop Mouse