Brigade Electronic's bbs-tek® multi-frequency reversing alarms use a wide range of White Sound® frequencies to alert listeners of an incoming RV or other vehicle. This enables the listener to instantly locate where and what direction the sound is coming from. The broadband sound also gives people with hearing difficulties a better chance of hearing the alarm. bbs-tek® White Sound® reverse alarms create a ssh-ssh sound which is gentle on the ear and dissipates quickly, meaning the alarm can only be heard in the danger zone. Features:• Sound subsides quickly outside of the danger zone, meaning the alarms do not cause noise-nuisance• White Sound® alarms can operate effectively at 5 decibels lower than conventional beeping alarms• All bbs-tek® White Sound® warning and reversing alarms are guaranteed for life• Ideal for nightime travel to prevent disruption while safely sounding the alarm for those in the danger zoneSpecifications:• Current: Max 0.5 Amp• Operating Temperature: -40 to +185°F• Sounder unit: Speaker• Hole centers: 76mm / 3" Multi-frequency broadband sound Heard only where it matters Gives those with with hearing difficulties a better chance of hearing the alarm | Brigade Electronics White Sound Backup Alarm, 97dB