The Swift 300 gives you more than enough lumens at our lightest weight for headlights (82 grams). NiteRider makes this headlight USB rechargeable for convenient on-the-go charging. The Swift 300 features a highly durable light housing with Dupont Fiberglass reinforced nylon meeting all required FL1 Standards for impact testing and water / dust resistance. Vmax+ 150 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. SWIFT 300 FRONT LIGHT FEATURES - Lumen Output: 300 - 5 Modes with Run Times: 2:00 - 28:00h - Charge Time: 2:00h at greater than 500mA | 3:15h at 500mA - Water / Dust Resistant IP64 Rated - USB Rechargeable SWIFT 300 TYPICAL RUN TIMES Low--15:00h at 80 Lumens Med--9:00h at 150 Lumens High--2:00h at 300 Lumens Flash--12:00h at 300 Lumens Walk--28:00h at 20 Lumens Vmax+ 150 TAILLIGHT FEATURES - Lumen Output: 150 - 6 Modes with Run Times: 5:30-27:30h - Charge Time: 2:00h - Water / Dust Resistant IP64 Rated - USB-C Rechargeable Vmax+ 150 TYPICAL RUN TIMES Fast Flash--12:45h Slow Flash--10:15h Disco Flash--10:45h Pulse Flash--7:00h High Steady--5:00h Low Steady--27:00h