Signature Series 418 MHz Carbon Monoxide Transmitter - Voltage 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 12-24 volts supplied by the fire panel5-Year MFR Limited Warranty SKU: 921419 Weight: Length: Width: Height: Availability: List Price:: $85.95 Our Price: $84.95 You Save: $1.00 (1%) 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 Silent Call Signature Series 418 MHz Carbon Monoxide Transmitter - Voltage Input CO4-SS - transmits carbon monoxide (CO) alert when detected by fire alarm system. Be the first to review this product Product tags Carbon Monoxide (13)