This is the Safe T Alert Gas Fume Detector Alarm from MTI Industries.

Visual and Audible Alarm Indicator. Dual signaling, sounds an alarm & activates warning light.
Fume Protection against accidents caused by gas/propane spills or leaks.
Fire thermal sensor alarms when fire conditions exist.

Power: 12 VAC
Operational range: +/- 15%
Current Draw: 200 mA
Alarm Trigger: 20% or less of the lower explosive limit of gasoline, propane and CNG
Fumes Detected: Gasoline, hydrogen from batteries, propane, alcohol, acetone, CNG and other explosive vapors
Display Panel Size: 3-1/4"W x 2-3/4"H x 3/4"D

Warning: Product may contain materials cautioned by California Proposition 65
This is the Safe T Alert Gas Fume Detector Alarm from MTI Industries. Visual and Audible Alarm Indicator. Dual signaling, sounds an alarm & activates warning light. Fume Protection against accidents caused by gas/propane spills or leaks. Fire thermal sensor alarms when fire conditions exist. Power: 12 VAC Operational range: +/- 15% Current Draw: 200 mA Alarm Trigger: 20% or less of the lower explosive limit of gasoline, propane and CNG Fumes Detected: Gasoline, hydrogen from batteries, propane, alcohol, acetone, CNG and other explosive vapors Display Panel Size: 3-1/4"W x 2-3/4"H x 3/4"D Warning: Product may contain materials cautioned by California Proposition 65