Pet laser pen is made of high-quality stainless steel material shell. 2 in 1 light design, the red light can be used to tease the cat, and the white light can be used for lighting. Powered by 3 LR41 batteries, just unscrew the bottom battery buckle and install them. Comes with a circle ring, which can be used as key-chain, easy to carry. Nice tool to stimulate pet interest, make your pet never bored!