Be seen, stay safe, and ride with confidence with the NiteRider Vmax+ 180. An ultra-bright, USB-C rechargeable rear bike light featuring advanced COB (Chip-on-Board) LED technology. Emitting a powerful 180 lumens in a eye-catching beam.This compact and lightweight bike taillight is perfect for road cyclists, commuters, and urban riders. With 7 versatile modes, including flash, pulse, and steady options; it delivers up to 24 hours of runtime (low steady mode) and features mode memory, so it powers on in the last mode used.Its IP64 rating means it’s water and dust-resistant, ready for any weather or trail condition. It weighs just 59 grams, the Vmax+ 180 attaches securely and effortlessly onto seat posts (15.8mm–31.6mm), bags, or clothing (using the integrated clothing clip) making it ideal as a wearable safety light, too. Whether you’re commuting at dawn or riding at dusk, the Vmax+ 180 ensures you’re always seen and never left in the dark.Specifications: Lumen Output: 180 7 Modes with Run Times: 4:30-24:00h Charge Time: 2:00h Weight: 59g Li-Po | 3.7 Volts | 524 mAh | 1.94 Wh Water / Dust Resistant IP64 Rated USB-C Rechargeable\ Mode Memory (Powers ON in last mode used) Fits post diameter sizes ranging from 15.8mm - 31.6mm. 27.2mm is the most common seat post size. Run times per mode: Fast Flash - 11:30h Slow Flash - 9:30h Disco Flash - 8:30h Econ Flash - 20:00h Pulse Flash - 5:45h High Steady - 4:30h Low Steady - 24:00h