1. With the new 2.4g wireless technology, a USB port receiver is plugged into the U port of the computer, and the key and mouse share one receiver, plug and play; Adopting new intelligent power saving technology, it can automatically sleep and save power when not in use.2. Keyboard size:Length 28.5* width 11.9CM,Mouse size:Length 7.7* width 4.3CM;3. Need 3 no. 7 batteries, 2 keyboards and 1 mouse; Ex-factory unmatched batteries;4. The keyboard has multimedia functions, shortcut keys, chocolate mute design, and the mouse has a sound;5. Applicable system:Windows XP, Windows 2000,Windows Vista 7/8/10; MAC, Android OS; Support notebook, desktop, android smart TV, android player;6. Single package: keyboard + mouse +USB receiver (at the bottom of the mouse) + complimentary film + English instruction manual