Features： 1、5 Tone alarm horn, effectively avoid accidents on the road, guarantee the security of the drivers. 2、Made of premium quality material, ensure stability and durable for a long time use. 3、Microphone function, make you express clearly, deal with emergency efficiently. 4、It can be mounted on application that has a 12V DC power available, like trucks, boats, etc. 5、5 different sound, meet your different needs, you can choose what you want by the controller. 6、Built under strict control, ensure quality and good performance. 7、110dB loud, clear and striking, can\u0027t be ignored, a powerful warning. Specification： Features: 7 Tone alarm horn, effectively avoid accidents on the road, guarantee the security of the drivers. 110dB loud, clear and striking, can't be ignored, a powerful warning. Made of premium quality material, ensure stability and for a long time use. Microphone function, make you express clearly, deal with emergency efficiently. It can be mounted on application that has a 12V DC power available, like trucks, boats, etc. Built under strict control, ensure quality and good performance. 7 different sound, meet your different needs, you can choose what you want by the controller. Specification: Color: black Material: plastic Voltage: 12V Power: 100W Current: 2.0-2.5A Sound Level: 110dB Package Size: 18*17*12cm / 7.09 * 6.69 * 4.72in Package Weight: 620g / 19.93oz Package List: 1 * Speaker 1 * Controller 1 * Set of Hardware Package List： 1 * Speaker 1 * Controller 1 * Set of Hardware