Come and see our amazing products. This bicycle light is made of aluminum alloy, which is anti-falling, durable, and has a long service life. It can provide lighting, and warning, and is also an emergency power bank. It is also waterproof and can still be used in heavy rain. There is a power display on the switch, which can grasp the status of the power at any time to avoid the embarrassment of running out of power. It is a great promotional item and can be printed with your own logo.2.50" L x 1.50" W x 1.50" H Pls confirm with us about the packing info, stock color and exact production time before placing your order.