Bike Tail Light, Rechargeable Bicycle Taillight, Auto On Off Sensor Waterproof Bike Rear Lights for Night Riding and Bicycle Safety, 4 Light Modes

USB C Charging Design: Bicycle rear light supports USB C charging. It features a built-in rechargeable battery and comes with a USB C charging cable. It can be charged via a computer, mobile battery, adapter, or any device with a USB port (a red light indicates charging, a green light indicates full charge). This eliminates the need for frequent replacement of disposable batteries. Thoughtful Waterproof Plug: Rechargeable bike light's charging port features a custom waterproof rubber plug that seals tightly against moisture. This prevents water from splashing into the charging port and preventing charging when riding in the rain, significantly reducing device failure. Nighttime Safety: During low-light conditions, it's difficult to detect vehicles behind you. rear bike lights utilizes a high-brightness, high-power light source with a red warning light range of allowing vehicles behind you to identify your position in advance, allowing them to brake and evade with ample distance, providing a solid first line of defense.