102dB commercial vehicle backup alarm ES53-BACKUP ALARM DC12-80V,Multi voltage design Warterproof design 102dB commercial vehicle backup alarm ES53-BACK UP ALARMDC12V-36V,DC12V-80V,DC12-110VWATERPROOF DESIGN97-120DB CAN BE ADJUSTBEE BEE SOUND2 YEAR WARRANTY 102dB commercial vehicle backup alarm