1. It can be locked and unlocked without keys, passwords, and remotes. 2. The alarm may be triggered when the lock vibrates or is removed. 3. The alarm may be triggered when the cable is cut or the battery cover is removed. 4. Entering the wrong password three times may trigger the alarm. 5. The alarm sound can reach approximately 110 decibels. 6. A 4 - digit password can be set, with about 256 password combinations. 7. Locking, unlocking, finding the vehicle, and pairing operations can be carried out through the remote control, and there is an LED indicator. 8. It is powered by 3 AAA alkaline batteries (batteries are not included), and there is a low - battery reminder. 9. It reaches an IP55 waterproof level. 10. One remote control can control multiple locks or similar remote - controlled alarms. 11. One lock can be paired with up to around 8 remote controls. 12. The lock uses 3 AAA batteries (not included), and the battery life is about 3 months. 13. The remote control uses 1 CR2032 battery, and the battery life is over 3 years. 14. The remote control distance is about 40 meters. 15. Cable specifications: The length is 80 cm (40 cm/120 cm are optional), and the diameter is 10 mm. 16. Chain specifications: The length is 80 cm (40 cm/100 cm are optional), and the diameter is 6 mm. 17. The operating temperature ranges from -10°C to +60°C. 18. The storage temperature ranges from -20°C to +80°C. 19. The dimensions are 92×55×34 mm. 20. The color is black. 21. The material is ABS. 22. Package contents: - 1 alarm - 1 remote control 23. Only the above package contents are included. 24. Note: Due to light reflection and different monitors, the color of the item may vary slightly from the actual product. A measurement error of ±1 - 3 cm is allowed.