Description ECCO’s most compact and popular line of back-up alarms, the 500 Series provides a cost effective warning solution with ECCO quality and reliability. A glass-filled nylon housing with epoxy-encapsulated electronics provide exceptional durability and protection against moisture, dust and vibration. ECCO’s 500 Series Smart Alarm® measures ambient noise and adjusts sound levels, creating a volume that is safe without being annoying or contributing to noise pollution. Smart Alarms eliminate the need for constant manual adjustment and help prevent intentional alarm disconnection. 12-24V Emits sound at multiple frequencies attenuated above 4000Hz Warning signal is more directional and perceived to dissipate quicker than pure tone Sealed in epoxy for protection against dust, moisture, and vibration  Temperature Range: -40°F to 185°F (-40°C to 85°C) SAE Type C, CE, R10, AMECA Warranty: 5 Years Brand: Ecco Safety Group