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 FEATURESa Lumen Output: 500a 5 Modes with Run Times: 1:40 - 32:00ha Charge Time: 1:45h at greater than 500mA | 3:00h at 500mAa Water / Dust Resistant IP64 Rateda USB RechargeableSWIFT(TM) 500 TYPICAL RUN TIMESLow - 10:00h at 150 LumensMed - 3:40h at 250 LumensHigh - 1:40h at 500 LumensFlash - 12:30h at 500 LumensWalk - 32:00h at 30 LumensVmax+(TM) 150 TAILLIGHT FEATURESa Lumen Output: 150a 6 Modes with Run Times: 5:30-27:30ha Charge Time: 2:00ha Water / Dust Resistant IP64 Rateda USB-C RechargeableVmax+(TM) 150 TYPICAL RUN TIMESFast Flash - 12:45hSlow Flash - 10:15hDisco Flash - 10:45hPulse Flash - 7:00hHigh Steady - 5:00hLow Steady - 27:00h