Specification: Product size: 11 * 6 * 7cm Battery type: rechargeable lithium battery Battery capacity: 1500mAh Light source: LED Material: ABS Brightness: 300 lumens List of packages 1 * bike front light 1 * rear bike light 1 * USB cable 1 * speaker 1 * magnet 1 * rubber seat 3 * nylon rope 1 * Sensor rubber seat 1 * bracket sensor 1. ALL IN ONE - functions Our odometer bike light measures speed, distance and driving time. 2.LCD digital display and rechargeable USB display Bright LCD display with blue backlight allows you to easily view driving statistics. This bicycle front light set comes with a 1500 mAh lithium battery that can be charged hundreds of times for 3-5 hours per use. You can easily charge it via USB on your computer, laptop, phone, power bank or any device. 3. Waterproof bike light set This USB bike light set includes a front light and a rear light. The bike front light is made of high quality ABS material with IPX65 protection, so you don't have to let go of it if you get caught in the rain. The surface of piano lacquer technology, strong and durable. The rear light is also IPX4 waterproof, dustproof and waterproof. 4. 4 lighting modes Our Led bicycle lamp contains 4 light modes. Mode 1: The super bright white light is on. Mode 2: The white light becomes weak. Mode 3: The white light continues to flash and the orange auxiliary light continues to light up. Mode 4: The orange additional light continues to shine. 5. 5 recording modes Precise measurement adjustable to display total distance, maximum speed, average speed, bike time and one-way recording, suitable for outdoor bike rides and bike training.