Enhanced Visibility and Safety: Equip your bicycle with handlebar lights featuring an intelligent brake sensor that automatically adjusts brightness, ensuring high visibility and safety during night rides. Waterproof Design: With an IPX6 waterproof rating, these bike lights are built to withstand adverse weather conditions, making them ideal for outdoor cycling. Versatile Lighting Modes: Choose from 5 different lighting modes to suit your environment and battery life needs, providing flexibility and improved usability in various conditions. Product Name: R0 Bike Light Waterproof Rating: IPX6 Built-in Battery: 3.7V 250mAh polymer battery Battery Life: Approximately 6 to 40 hours Charging Input: 5V-2A USB Type-C Operating Temperature: -10°C to 60°C Operating Humidity: Up to 80% Features: Synchronized frequency mode, brake sensing, automatic sleep, vibration activation, 5 installation options Color: Black Material: PC+ABS Package Contents: 2 x Handlebar Lights, 1 x Charging Cable, 1 x Wrench Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.