Features: The 12V 24V general Backup Alarm with Bird chirps Alert systems ensures safe reversing for cars and trucks, featuring a soothing avian tone that effectively alerts pedestrians without causing noise disturbance. Crafted from strong plastic, this reverse parking sensors offer tool easy installation and a mimetic sound design, replacing harsh beeps with natural bird calls for enhanced user comfort. Ideal for novice drives, nighttime operators, and commercial vehicle owners, this versatile alarm provides stable safety cues during complex reversing maneuvers. Perfect for parking lots, tight city spaces, and low visibility conditions, the device operates seamlessly day or night to prevent collisions during vehicle reversal. Engineered for all weather flexibility , this innovative backup solution combines weather resistant construction with gentle hearable warnings, creating safe environments around reversing vehicles. Specifications: Component : plastic Length: about 9cm/3.54inch Diameter: 100 (mm) Power: 50(W) Sound levels: 125 () electric : 12(V) Sensitivity: High Appearance dimensions: 90(mm) Package Includes: 1xBackup Alarm note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.