The wireless keyboard needs charging.
Wireless keyboard and mouse need charging. Wireless mouse uses wireless technology to communicate with the computer, thus eliminating the bondage of wires. In playing games, wireless keyboard and mouse and wired, computer CPU handles the same situation, using wireless 2.4G, there will be no more delay, of course, except for the explosion of the game area, at that time, whether wired or wireless will have a little delay.
The wireless keyboard requires a receiver to plug into a USB port and then the keyboard needs batteries.