1. Bicycle alarm: Use AAA batteries (3 batteries are not included in the delivery) and standby for 6 months 2. Remote control: Use CR2032 batteries, standby for more than 1 year 3. Remote control wireless range: Up to 20 meters 4. Shell material: IP55 waterproof PC, suitable for outdoor use 5. Working environment temperature: -20-60℃ Working environment humidity: Less than 80%RH Alarm volume: 100dB Alarm duration: 15 seconds Sensitivity level: 1-5 Color: Black Material: ABS Package Contents: 1 * Electric vehicle anti-theft alarm 1 * Remote control (different batches, remote control style is random, No designation accepted. delivery does not include 3 AAA batteries) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.