Aftermarket 7 sounds style car alarm horn + microphone system kit  High strength shell, waterproof, corrosion-resistant Including microphone, can work as a PA system  Pure and super loud sound, can shout out your own voice by pressing the side key 7 different kinds of sounds: horn, siren, HI-LD, wail-1, wail-2, wail-3, wail-4 Easy installation with mounting bracket and screws Red wire connects to 12V power supply positive Black wire connects to 12V power supply negative Fitment: Color: black Power: 100W Voltage: DC12V Instruction: not included Fit for most of cars, vans, trucks, motorcycles, mopeds Note: Please place the microphone behind the horn. (Keep at least 1-meter distance to prevent interfering noise.) And don’t make them face to face when you use. Package Included: 1X Horn 1X Microphone 1X Mounting bracket Necessary hardware included