Interface 2.4 GHz Wireless Receiver USB wireless receiver Dimensions (WxDxH) Keyboard: 43.3cm x 12.3cm x 3.4cm Mouse: 11.532cm x 3.88cm Batteries 2 Supported Battery Type AA Weight 400g, 65g Keyboard Hot Keys Function Volume, mute Keyboard Technology Plunger Mouse Buttons Qty 3 Mouse Movement Detection Technology Optical Mouse Movement Resolution 4000 dpi