The moon also includes an auto shut-off mechanism to preserve battery life, making this item perfect for bedtime. It is really easy to set up and no mains electrics are required, it is powered by just 4 x AA batteries in the moon and 2 x AAA batteries in the remote. You can also read fascinating information about the moon in the colourful educational booklet included. This detailed moon makes a stunning room accessory or a reassuring night light.