The Swift(TM) 500 gives you more than enough lumens at our lightest weight for headlights (82 grams). NiteriderA(R) makes this headlight USB rechargeable for convenient on-the-go charging. The Swift(TM) 500 features a highly durable light housing with DupontA(R) Fiberglass reinforced nylon meeting all required FL1 Standards for impact testing and water / dust resistance. Vmax+(TM) 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(TM) 500 FRONT LIGHT FEATURES a Lumen Output: 500 a 5 Modes with Run Times: 1:40 - 32:00h a Charge Time: 1:45h at greater than 500mA | 3:00h at 500mA a Water / Dust Resistant IP64 Rated a USB Rechargeable SWIFT(TM) 500 TYPICAL RUN TIMES a Low - 10:00h at 150 Lumens a Med - 3:40h at 250 Lumens a High - 1:40h at 500 Lumens a Flash - 12:30h at 500 Lumens a Walk - 32:00h at 30 Lumens Vmax+(TM) 150 TAILLIGHT FEATURES a Lumen Output: 150 a 6 Modes with Run Times: 5:30-27:30h a Charge Time: 2:00h a Water / Dust Resistant IP64 Rated a USB-C Rechargeable Vmax+(TM) 150 TYPICAL RUN TIMES a Fast Flash - 12:45h a Slow Flash - 10:15h a Disco Flash - 10:45h a Pulse Flash - 7:00h a High Steady - 5:00h a Low Steady - 27:00h