Enhanced Safety Features: The MEROCA Smart Bicycle Tail Light features advanced auto start/stop technology and a sensitive brake detection system to enhance visibility and safety during rides. Waterproof and Durable: With an IPX6 rating, this tail light is fully waterproof and built to withstand all weather conditions, ensuring reliable performance. Convenient USB Charging: The built-in rechargeable battery can be charged via USB, providing extended runtime ideal for long rides and daily commuting. Universal Fit: Designed for compatibility with most bicycles, the light installs quickly and easily, getting you back on the road with minimal setup. Light Modes: One press of the power button turns the light on. Additional presses cycle through 7 modes: 3 flashing modes, 3 steady brightness levels, and 1 breathing mode. Lamp Beads: COB LED Maximum Brightness: 100 lumens Beam Angle: 180 degrees Battery Capacity: 500mAh Lighting Modes: Steady / High / Fast Flash / Flash Color: As Shown Dimensions: 11 x 8 x 3.5 cm Material: AL6061 Styles: A Cushion Color / B Seat Tube Black / C Cushion Gold Pink / D Seat Cushion Black Package Contents: 1 x Bike Light 1 x Bracket 1 x Data Cable Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.