12V RV Carbon Monoxide and Propane Alarm, Valve Relay for Automatic Shut-Off Replace your old or failing CCI-7719 combination carbon monoxide alarm and propane gas alarm in your RV, trailer or Fifth Wheel. Combination carbon monoxide and gas alarm includes a replacement gas valve and solenoid relay. The Safe-T-Alert 70-742-R-BLK in Black has two sensors: this gas monitor detects carbon monoxide fumes and raw propane gas. When either gas is detected, the 12 volt gas detector sounds a loud alarm sounds and the relay then shuts off the propane tank gas valve. R eplaces CCI-7719 unit but MUST be used with the Safe-T-Alert valve to avoid a fire. Note, replace the entire kit if the gas monitor fails.This gas monitor has 4 wires. Note: CCI Controls went out of business in 2009. Safe-T-Alert 70-742 units with relays and UL approved gas valves are approved replacement units for these CCI mode ls: CC-7719.04, CC-7719.58 and CC-7719.70. Note: Picture shown may not be black . These are all surface mounted units. Note: Picture shown may not be black. Made in USA . Other explosive gases such as acetone, alcohol, butane and gasoline are also detected by this combination combustible gas alarm. However, UL has not listed the monitor for these other combustibles. The carbon monoxide sensor is very sensitive to CO gas but will not react to most other gases. Notes about this Dual Gas and Carbon Monoxide Alarm: Requires 12 Volt power to operate. Indicates the presence of gas only at the sensor. Intended for use in RV"s when installed inside: this is not designed for compliance with industrial and commercial applications. 85 decibels but may not be heard if located in remote locations, behind closed doors or by persons who are hard of hearing, have consumed alcoholic beverages or prescription or other drugs. Dual Propane/LP and Carbon Monoxide Alarm Features Include: Meets 1/1/05 requirements set by RVIA for new RV"s requiring both Propane detectors and CO alarms. Also detects C