... /OFF button)Power supply3 pcs of aaa battery(include)Led7 led lightInstallIt can be mounted on bicycle handle, seatpost, helmet, wheel ... , bag, umbrella, pet bicycle brake light FeatureBeautiful 7 led bike light design, very fashionSoft, steady, durable, waterproof No matter ... . 6,Usage: light up in the dark when you ride a bike Pictures for your reference: bicycle christmas lights