2.4Ghz Wireless Connection--Both the LED wireless gaming mouse and keyboard use a 2.4G wireless connection and share a USB adapter. The effective distance is 10 meters, with no delay and a response speed comparable to that of a wired keyboard. Attention: The USB adapter is on the back of the mouse (Note: Before using the keyboard and mouse, the USB adapter must be plugged into the computer to work properly and turn on the backlight) Rainbow LED Backlit Keyboard--The rainbow LED gaming keyboard is wireless, and has 3 brightness and breathing speeds for you to choose from. All buttons are backlit, so you can find the keys accurately in the dark. The wireless gaming keyboard has clear and uniform light transmission, and the keycap characters never fade Rechargeable & Long Battery Life--The gaming keyboard is equipped with a 2500 mAh battery, and the mouse has equipped with an 500 mAh battery. The long battery life allows you to use them continuously for 10 hours with ligh