2-in-1 RV Alarm: Most gas leaks incidents occur at night and during cooking. The VITITE 2-in-1 alarm is ideal for monitoring CO propane levels inside your RV. It meets UL1484 UL2034 safety standards, ensuring safe cooking and sleeping while enjoying your RV travels Replace old RV Detector #31011: Face Cover Size: 4 5/8" Width x 4 5/8" Length. Wall Cutout Size: 2" Width x 3 3/8" Length. Equipped with lever nut connectors, the installation requires no tape or wiring. No setup is required Digital Display Alarm: When the RV detector detects carbon monoxide or propane, it responds in as fast as 0.5-2s. The easy-to-read digital screen displays the leak concentration, and an 85dB alarm provides early warning 60 Months of Worry-Free Use: VITITE offers superior service and experience. If you encounter any issues within 60 months, contact us for assistance. We typically respond within 24 hours, providing free repair or replacement services What You Get: An RV carbon monoxide propane gas detector, a lever nut connector, four screws, a user manual, and lifetime support from gas experts