The pillow can be opened wide. The pillow can be opened wide; Uses 3 AA batteries or 4.5 DC adapter (not included Simply press the button and your pet will turn on a soft glowing light that creates a magical environment to help your child fall into a restful sleep. Each pet has LED lights that create a glow without producing any heat and the built in optional timer automatically shuts the light off after 20 minute It can be used as both a comforting pillow and a night light, providing dual functionality for a peaceful sleep environment. The Pillow Glow Pets Night Light Plush Rainbow Monkey offers a comforting and calming presence for children who may be afraid of the dark.