Super Bright USB LED Bike Rechargeable Headlight Set Black : Front light and 2 In 1 Design, Horn can emit warning sound up to 120dB, press button , change to sound, there are 4 sounds and 3 lighting, perfect for outdoor This is a Micro USB battery, Bulid-in 1200mAh lithium battalion, when full, can work about many hours in high mode Can also be used emergency flashlight Maximum brightness up to 250 lumens, sure to get on the road during evening rides or high/middle/stroboscopic light commutes Customize different needs on different roads Horn 120DB sounds can be switched freely, which is very helpful to protect safe on the road Rated water resistance in splash protection from any angle, 1200 mAh lithium battery, 250 Lumens, comes with Headlight button Charging cable USB, easy to install and use, no tools needed - Inner mesh panties Material: ABS electronic Size: approx. .2x5.1cm / 4.02x2.01Inch. Weight: 83g. Lumens: 250. : XPG Fits 3.7V voltage contains: 1-piece bicycle headlight 1 pc. Charging cable USB 1 pc