... concrete, asphalt, and under pave ·Single point connection ·Twin conductor cable ·Silent, efficient, and safe ·Emits zero EMF (electromagnetic fields) ... ·Durable construction ·15-year limited warranty against manufacturing defects Cable Construction: Twin conductor Rated Voltage: 208V,240V,277V,347V, ... ) Min. Installation Temp.: 40°F(5°C) Cold lead 20ft (6m) length heating cable/mat for floor heating