The Blackburn GRID Rear Light is a high-performance bicycle light designed to provide maximum visibility and safety on the road or trail. It features a durable aluminum construction and a bright LED bulb that provides clear and bright illumination in low-light conditions. The light has three different modes, including a flashing mode and a steady mode, allowing riders to customize the light output to their specific needs. The Blackburn GRID Rear Light is USB rechargeable, with a runtime of up to 40 hours on a single charge, making it a reliable and convenient choice for daily use. It also features a low-battery indicator and an LED fuel gauge that displays the remaining battery life. The light is easy to install and comes with a universal mount that fits most seatposts. The Blackburn GRID Rear Light is a reliable and essential tool for any cyclist looking for a high-quality and versatile rear light.