... switch control (High/low/off) Meet CE, FCC, Emark Car Buzzer Parking Sensor Of Volume Adjustable:Buzzer volume switch control (High/low/off ... 40HKZPackage Includes:1x Beeping buzzer1x Main control box 4x Parking sensor 1x Power cable 1x 22mm drill 1X English manualOptional ... please notify us. Thanks!For quantity order, we have multiple sensor colors for option, please contact us for more details.Volume ...