Using this keyboard is a breeze. First, charge the rechargeable battery using the included USB cable. Once charged, turn on the keyboard and pair it with your computer using the 2.4 GHz wireless link. It only works with USB - hosts like computers, so don't try to use it with an Arduino or Basic Stamp. When using it with a Raspberry Pi, it will only take up one USB port. As for maintenance, keep the keyboard clean by gently wiping it with a dry cloth. Avoid exposing it to extreme heat, cold, or moisture. If the battery runs out, just plug it in again using the USB cable for a recharge.