Vmax+ 180 is NiteRider’s first taillight featuring 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. FEATURES: 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) SPECS: Fits a Range of Seat Post Diameters: 15.8 mm – 31.6 mm (27.2 mm most common) Run Times* Fast Flash: 11h 30m Slow Flash: 9h 30m Disco Flash: 8h 30m Econ Flash: 20h 00m Pulse Flash: 5h 45m High Steady: 4h 30m Low Steady: 24h 00m