The Vis 180 series redefined tail lights as the safest most reliable platform available The Vis 180 Pro continues this traditon by offering the brightest tail light on the market with a piercing 200 lumens of output in pulse mode. With a wide spread of red rear lighting combined with Light & Motion exclusive amber side lights for increased visibility at intersections the Vis 180 Pro is the essential tail light for commuters Featuring:200 Lumen output certified to the FL-1 Standard in pulse mode Engineered with the highest-level CREE LED & enhanced firmware Dual LED array to maximize visibility Ultralight Aluminum body Accurate battery charge & status indicator with 4 status levels Custom engineered reflectors & optical solutions optimize the light to distribute red & amber light a full 180 degrees Secondary LED spreads amber light for 180 degrees of visibility Simple ratchet in/out adjustability Slide lock system means that you can easily take on / off without tools Integrated clip for attaching to backpack or messenger bag Bike rack mount available & sold separately Micro USB Rechargeable (Fully charges in 5 hours) Low battery warning & auto shut-off to prevent damage Multiple power settings: Hi Pulse: 6:00 / 200 Lo Pulse: 12:00 / 100 Solid: 4:00 / 110 Paceline: 32:00/ 5 Ultralight system weight: 102 grams Designed & Assembled in California Backed by Light & Motions 2 Year Warranty