Features: - The car siren is designed in old style. This unique old fashioned air horn brings back old memories, protect your safety, also gives you unique using experience. - Frequency: 490Hz, Sound Pressure Level: 110DB; When driving in a noisy area, it can trigger an clear vintage horn OOGA! OOGA! Sound. - 110DB old fashioned alarm horn is made of plastic, which has low power consumption, good dustproof and waterproof effect. - Powerful alarm siren, easy to install with one button (install 1 bolt + 2 terminals to connect), very convenient to install, saving time and energy. - Works with standard 12V DC. electrical systems, designed for car, trucks, RV or any 12V vehicle. Specifications: Sound Level: 110dB Material: ABS + Metal Color: Black Voltage: 12V-3A Frequency: 490Hz Length: 230mm/9.05inch Fitment: Suitable for all 12V vehicles such as cars, boats. Note: - Use 5A+ Fuse: High current requires a 5A or higher fuse to avoid failure. - Check Polarity (+/-): Must connect to marked terminals (+/-). Reverse wiring = no sound, only motor hum. - Fix Reverse Polarity: If silent but hums, swap wires immediately and retest. - Never Reverse Long Term: Prolonged reverse connection damages the air horn. Package Includes: 1 x Car Horn