2.4 GHz wireless technology delivers a reliable connection with up to a 10M range. No wires make a more smart and tidy desktop. The keyboard and mouse share the same USB receiver to save the computer's USB ports . Very resposive keys in scissor-key-switches. Real compact and slim in fullsize design. Low power battery indicators and multi-media hot keys provide convenience. Keyboards keys in low profile make much less noise when typing. *About the usb receiver:Open the battery slot on the back of the keyboard or mouse and the usb receiver is inside.The keyboard and mouse use the same receiver, they only need 1pcs receiver. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia