Features: 1.High Performance: Three sound effects, duck, patrol and ambulance options, with 12V 120 dB tweeter, loud voice can hear far away. 2.High Decibel Alarm: Professional alarm horn, real time decibel value of 120DB, high volume and could keep the sound smooth and not harsh. 3.Firm Frame: The bottom adopts metal retention mechanism, triangular screw fixation, easy and firm installation, will not be shaken due to road bumps! 4.Waterproof: Light and convenient, rainproof and dustproof, plastic shell, not easy to break, can be used normally even in bad weather conditions. 5.Wide Application: The sound quality is clear and loud, energy saving and low consumption, widely suitable for 12V models in a wide range of scenarios. Specification: Item Type: 3 Tone Siren Material: Plastic Voltage: 12V Power: 30W Current: 2A Specification: 3 tones Sound Decibels: 120 decibels