Make cycling both safer and smoother with the Rockbros A54BK rear light. A compact bike light with a bright, red light that helps you be seen when it's dark. The light is IPX5 waterproof so it can handle all weather. With a powerful battery capacity, you can cycle with up to 6 hours of powerful lighting before it's time to charge via the included micro USB - USB-A cable. The light is easily mounted under the saddle and has practical modes to choose from for increased visibility in traffic. Specifications: Brand: Rockbros Model: A54BK Color: Black Material: Plastic Lamp power: 100 lumens Battery capacity: 500 mAh Charging connector: Micro USB (female) Location: Under the saddle IP rating: IPX5 waterproof Package contents: Rockbros A54BK bike light, mount, micro USB - USB-A cable Benefits of Rockbros A54BK Bicycle Taillight, Rechargeable 500mAh – Black Bright red light makes you visible and increases safety Sustained battery life of up to 6 hours Quick and easy installation under the saddle Five different light modes for optimal visibility on the roads