This parking aid features an LED warning light and ble alert to help you stop at a safe parking distance, day or night. Garage parking brake, garage parking indicator, and parking assist with simple traffic light display for distance guidance. The system includes two parts: a sensor and a traffic light indicator. Height is adjustable based on vehicle requirements, assisting in precise parking for all vehicle types. Powered by a single 9V battery (not included). Due to shipping regulations, the battery is not included. Mounting options include double-sided foam tape or screws. Easy installation; the sensor can be placed in various locations. Power supply: One 9V battery (not included) Color: Blue Material: ABS Package Contents: 1 x Parking device Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowance is +/- 1-3 cm.