First Alert Hardwired 120V Electrochemical Carbon Monoxide Alarm XL Big Green Egg Modular Rust-proof aluminum retainer with a

Rust-proof aluminum retainer with a U-shaped vinyl floor seal to help keep out wind

large cushion type seal not easily damaged

Feature an exclusive grooved cap design which prevents thread abrasion

032 prime aluminum

100% cotton cap resists sparks

First Alert Hardwired 120V Electrochemical Carbon Monoxide Alarm XL Big Green Egg Modular Rust-proof aluminum retainer with aFirst Alert hardwired carbon monoxide detector with battery back up. Features an electrochemical sensor which detects carbon monoxide gas and measures the concentration. Sounds a loud 85 decibel alarm when potentially harmful level is reached. 2 silent features; unwanted alarms and low battery silence. Instant test reset button. 9 volt battery included. Battery life varies according to use and application. Recommended for professional installation