Signature Series 418 MHz Carbon Monoxide Transmitter- Contact Input Manufacturer: Silent Call Be the first to review this product Works with any Signature Series 418MHz receiver (not included)Panel-activated and designed to be wired into a home or building fire alarm system using a dry-contact relayInstallation by a licensed electrician or fire alarm company recommendedOperates on two (2) AA batteries (included)5-Year MFR Limited Warranty SKU: 921418 Weight: Length: Width: Height: Availability: List Price:: $89.95 Our Price: $84.95 You Save: $5.00 (5%) Availability: Usually ships within 1 to 2 business days Qty: Add to cart Add to wishlist Email a friend Ask question about this product DetailsCustomer Reviews The Silent Call Signature Series 418 MHz Carbon Monoxide Transmitter- Contact Input CO3-SS transmits carbon monoxide (CO) alert when detected by a fire alarm system. Be the first to review this product Product tags Carbon Monoxide (13)