Awesome Light. Awesome Price. Featuring eye-popping BLITZ Daytime Running Mode to grab the attention of cars, IP-67 submersibility and ample side visibility, the Dayblazer 400 puts light where riders need it most. Specs Lithium Battery Packaged In Product Recharge Type Micro-USB rechargeable — Charges via any standard USB port Number of Batteries 1.00 Brightness Up to 400 lumens Batteries Included Batteries Included Sport Cycling Lithium Battery Energy Content Watt Hours 3.3 Battery Type Lithium Polymer Country of Origin China Batteries Needed Yes Recharge Time 3-hour recharge Mounting Options Swivel mount - A rotating mount allows the light to be adjusted to center on the road! This versatile silicone mount fits handlebars from 22–35mm and can be used to strap to some helmets. Universal Light Mount action-camera-style mount sold separately Product Weight 59 grams Run Time Blitz mode: 1 hour at 400 lumens Low mode: 1.5 hours at 200 lumens Pulse mode: 6 hours at 200 lumens Strobe mode: 10 hours at 200 lumens Water Resistance IP-67 submersible - Ingress protection rating, or "IP Rating," is a techy way to describe the level of water- and dust-proofness of a product. This light meets the IP-67 Standard, which means it is totally protected against dust/grit and fully protected against the effects of immersion between 15cm and 1 meter for 30 minutes.