Features1Super waterproof, you can ride freely in rainy day. Adopted high brightness energy saving LED. 2The set includes a headlight and a taillight, high brightness and wide lighting range ensure safe riding at night. 3The headlights are fitted with mounting brackets that can be easily attached to the handlebars. 4The silicone strap design for the headlights has 3 openings that can be attached to most sizes of seat posts. 5The headlights and taillights is easily install and remove without any tools.SpecificationItem Type: Bicycle Headlights Taillights SetMaterial: Aluminum Alloy + Plastic Color: As Pictures Shown HeadlightsSize: Approx. 6.5x2.8cm/2.6x1.1inTaillights Size: Approx. 2.95x1.26/7.5x3.2cmWeight: Approx. 78g/2.8ozProduct Use: LightingGear Position: Full Light, Half Light, FlashingHeadlights and Taillights Contain Built-in Polymer Lithium Batteries, USB Rechargeable (400mAh Headlights + 200mAh Taillights)Package List1 xHeadlight1 xTaillight2 x USB Data Cable2 x Ring