WarmlyYours 4-poles Small Relay Panel, for Snow Melting Systems SUITABLE FOR SNOW MELT(ING) HEATING MATS AND CABLES: Designed for use with snow melting, slab heating, and roof deicing applications, power relays are rated for up to 24 amps, include a NEMA 1 rated metal enclosure for protection and clearly labeled terminals for easy installation, utilize 120V coils CUT DOWN UNNECESSARY WEAR: When installing a snow melting, roof and gutter deicing, or even slab heating system, including a ultra-quiet power switching panel will help cut down on unnecessary wear on your control by acting as an intermediary switch between the control and the heating element C-UL-US APPROVED: The RLY-4PL panel is C-UL-US approved, appropriate for use with 120, 208, 240 or 277 VAC floor heating cables, they are virtually silent during operation VARIETY OF SIZES: WarmlyYours offers three sizes of relay panel, available in small, medium and large 2-YEAR WARRANTY: Limited 2-year warranty and 24/7 lifetime installation and technical support at 800-875-5285