Portable Alarm Ringer Continous Sound Universal Dc 3-24v Piezo Electronic Buzzer Beep Durable Intermittent Continuous Beep Description: 100% Brand New High class quality and very durable The system turns on automatically when the car engine starts. Beeping alarm prompt step bystep, closer the obstacle, more rapid the alarm sound. Double CPU for rapid response. High quality and easy to install. Specification Color: Black Quantity:1 pc Alarm Diameter:22mm/0.86" Alarm Height:10mm/0.39 2 Mounting Holes distance:30mm/1.18" 2 Wires length:90mm/3.54" Buzzer Type: Piezoelectric Sound Pressure Level 95 dB Rate Voltage: 12V DC Operating Voltage: 3 - 24V Max Current Rating 10mA Frequency 3900500Hz Drive Method: Drive Circuit Built in Mounting Holes Sound:"Di" Continuous Specifications: 100% Brand New High class quality and very durable The system turns on automatically when the car engine starts. Beeping alarm prompt step bystep, closer the obstacle, more rapid the alarm sound. Double CPU for rapid response. High quality and easy to install. Package Included: 1 x 95DB Piezoelectric Buzzer Alarm Notes: Duetothedifferencebetweendifferentmonitors,thepicturesmaynotreflecttheactualcoloroftheitem. Comparethedetailsizeswithyours,pleaseallow1-3cmerror,duetomanualmeasurement. Pleaseleavingamessagebeforeyougivethebadfeedback,iftheproductshavesomeproblems. Thanksforyourunderstandings