Features: The Back up Alarm delivers loud 105dB warning tone with IP67 waterproof rating, ensuring performances in harsh conditions for trucks, car, and motorcycles. Constructed from ABS plastic, this reversing horn features reverse polarity protections and easy installation for 12V-24V vehicle systems. for commercial driver, daily commuters, and fleet operators requiring clear audibles alerts during reversing maneuvers. Enhanceds safety in low visibilitys scenarios like nighttimes reversing, crowded parking lots, or industrial zones with its penetrating sound. for weather durabilitys, its housing integrates seamlessly into automotive warning systems while resisting moisture and vibration. Specifications: Type: Multitone & Alarm Horn Materials texture: ABS plastic Special features: Waterproof Output power: 15W Color: Black & Red Voltages: DC12V - 24V Horn diameter: 70mm Rateds current: 300mA Volumes: 105dB Impedance: 2Ω Application location: motorcycles, car, vehicles Package Includes: 1PC Back-up Alarm note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.