SF31 Bicycle Rail Light Brake Steering Sensor Anti-Theft Alarm Wireless Remote Control Warning Bell 1. Press the remote control bell button to remind pedestrians and vehicles to avoid 2. Anti-theft alarm function, remove the remote control to arm when parking, scaring off thieves 3. PC+ anti-UV material, waterproof and dustproof, high and low temperature resistance 4. Waterproof and dustproof structure, easy to install, suitable for various car models 5. When passing through a tunnel or traveling at night, the warning light will automatically light up 6. When you want to turn, press the left and right steering keys 7. Lightly brake and brake suddenly, and the brake light will be highlighted immediately 8. Remote control battery: built-in CR2032 button battery 9. Wireless distance: 50 to 60 meters in open space 10. Power supply: USB charging built-in 18650 lithium battery 11. Function: warning + brake + steering + electric bell + anti-theft 12. Lighting: 160LM 13. Charging time: 7 to 8h 14. Use time: Strobe flashing about 70h, Constant light about 35h 15. Transmitting and receiving frequency: 433.92MHZ 16. Battery capacity: 2000mah 3.7v 17. Six warning tail light modes: slow flashing, breathing, burst flashing, constant light, emergency double flashing, tail light off 18. Working environment temperature: -40 to 60 degrees celsius 19. Size: 15.8x8.6x6.5cm 20. Weight: 272g