USB Rechargeable Bike Tail Light , Super Bright Bicycle Rear Light Easily Clips On as Taillight for Optimum Cycling Safety - IP44 waterproofColor style: redName: Bicycle highlight tail lightBattery: 250mAh lithium batteryCharging method: USB chargingMaterial: pcWaterproof: IP44Size: 65*25mmWeight: about 25gFlashing mode: long bright, gradually brighter and darker_slow flashing-~fast flashingFeaturesMotion Intelligence DetectionDaily life waterproofUSB chargingSelf-sensing to adjust brightnesstouch controlLarge capacity batteryLighting ModeScenario 1: No need to look for a switch in the dark, just touch itScenario 2: It will automatically shut down if it is still for one minute, and it will automatically turn on if there is vibration.Scenario 3: The automatic high warning function during the day is a bicycle daytime running lightLife waterproofNo fear of wind and rain, IP44 waterproof design can also be used in rainy days, the warning effect is strongerConvenientTouch control, short touch: on/off; long touch: toggle flash modeSuper valueFITS EVERY BIKE: The premium bike taillight kit combo attaches to virtually any bike frame, fork, seatpost, handlebar or helmet.Bright lightBest choice for cyclists: city riding or mountain MTB riding? You'll revel in the safety features of this red taillight - powered by a reliable, rechargeable lithium 250 mAh battery and bright LEDs, cyclists say it's an all-around best choice for night riders or daylight commuters.