Sound level:130dBColor: Black Material: Durable Plastic Fitment: Fit for most of 12V motorcycles, mopeds, cars, trucks Feature: - The sound is clear ,pure, super loud - With mounting bracket,the installation is simple. - Five different kinds of siren sounds,with microphone functions. Installation: - Red wire connects to 12V power supply positive,black wire connects to 12V power supply negative. - Fix the screws is OK. Note: - The supply voltage should meet the operating voltage, or can not work properly. - The wiring should be correct, otherwise it does not work. - The speaker wire should be avoided a short circuit. Package Include: 1 X Horn 1 X Microphone