brand new and high quality Feature: The for radar 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: Type:Backup Alarms Horns Color: Black 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 95dB 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 Quantity: 1Pc Note: Transition: 1cm=10mm=0.39inch Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:(Without retail package) 1 X 95DB Piezoelectric Buzzer Alarm