1. When the car is about 2.5 meters away from the parking device, the green light will be on, and a slow frequency alarm will sound. 2. When the car is about 1.5 meters away from the parking device, the yellow light will be on, and a medium-frequency alarm will sound. 3. When the car is about 0.5 meters away from the parking device, the green light is on, and a rapid frequency alarm sound prompts. 4. Scope of application: parking plants, garages 5. Material: ABS 6. Power supply: 9V battery (not included)
