Rechargeable Battery And Battery IndicatorOur bike lights feature USB-C rechargeable, enabling your bike light is always ready for your next ride. Fully recharge in less than 3h when connected to any USB port. Runtime of up to 8h on flashing mode for the headlight.And with 4 LEDs power indicator,you would clearly know the power status anytime to minimise the inconvenience of sudden shutdown.Tail Light Four Mode OptionsThe rear light feature an one-touch switch with four different lighting modes depending on your preference. Include full brightness, half brightness,fast flashing and slow flashing.IPX5 Waterproof and Easy InstallationAdopt ABS housing,super sturdy,dustproof and waterproof,ensure the bike light kit can work properly in rainy and foggy days on both city and country roads.Adopted special heat dissipation shell,quickly dissipate heat,fully protect the battery life,ensure the lights can be used for a long time! One-touch quick release installation,no tools required.Multiple UseThe headlight and taillight can be widely used in a variety of scenes.Suitable for cycling,fishing,running,dog walking,hiking, camping,changing tire,night time family,kids activities or other activities.In special circumstances,it can also be used as an emergency flashlight.Five ModesFive lighting modes bike light (High brightness mode,Medium brightness mode,Low brightness mode,Flash mode,Light sensing mode) to serving your various needs! Press the switch,indicator light green light that enters the light sense mode,bicycle light turns on automatically when there is insufficient ambient lightbicycle light turns off automatically when the ambient light is sufficient.