The Swift series headlight gives you more than enough lumens at Niterider&';s lightest weight for headlights. NiteRider makes this headlight USB rechargeable for convenient on-the-go charging. The Swift series features a highly durable light housing with Durable Fiberglass reinforced nylon meeting all required FL1 Standards for impact testing and water / dust resistance. Vmax+ 180 features COB (Chip-on-Board) LEDs, which for cyclists means it emits highly visible flash patterns in a smaller, more compact package. Its feather-like light weight makes it perfect as a wearable safety light-easily clipping onto straps, belt loops, and more. For added convenience, the Vmax+ 180 features mode memory, will power ON in the last mode used. Note: The NiteRider Swift is shipped from the factory in Travel Lock Mode. This mode feature is designed to save battery power by preventing the head light from accidentally turning on while in storage. Simply press and hold power button 8-10 seconds to lock / unlock Item Specifications Battery Rechargeable Lumens Front 450 Lumens Rear 180 Recharge Type USB Weight 82/59