Wireless 2.4G Keyboard and Optical Mouse. – Instant connecting. – Effective operation range: up to 10m. – USB Interface. – Nano style receiver. – Windows XP/VISTA/win7 compatible. MOUSE: – Receiver parked inside the mouse. – 3 basic buttons. – Scrolling Wheel. – Power: 2XAAA 1.5V Alkaline battery. – Dimensions: 90x60x35mm. KEYBOARD: – 80 Keys – Power: 2XAAA Alkaline battery. – Dimensions: 284x120x20mm.