Features 1Designed to work on 12-80 volt DC vehicles, automatically adjust to a voltage range of 12-80 volt car and motor-vehicle. 2Made from premium quality materials to ensure durability and longevity,perfectly work in a variety of temperature environments. 3Backup alarm can make a powerful beeping sound that is 110dB,nobody will ignore this beeping sound when you are reversing vehicle. Specification Features: Designed to work on 12-80volt DC vehicles, automatically adjust to a voltage range of 12-80 volt car and motor-vehicle. Made from premium quality materials to ensure durability and longevity,perfectly work in a variety of temperature environments. Backup alarm can make a powerful beeping sound that is 110dB,nobody will ignore this beeping sound when you are reversing vehicle. Specifications: Power: 30W Color: Black Current: 1.5-2.0A Decibel: 110dB Material: Plastic Voltage: 12V-80V DC Package Weight: 330g/11.6oz Style: Dense grid/transverse Line Package Size: 10.5*8*5cm/4.1*3.1*2in Package List: 1* Reverse Horn (Transverse Line style) Package List 1* Reverse Horn (Transverse Line style)