Schneider Electric EER56000 Wiser Single Stage Smart Thermostat ZigBee Smart Energy Thermostat with ZigBee (2.4 GHz) 100 maw output power Wireless communications enables easy implementation and remote functionality A common wire is required or a Wiser Thermostat Auxiliary Power Supply accessory may be used if a common wire is not available UL94VO durable and flame retardant plastic housing with 24VAC control contacts and 2.75x1.625 LCD dot matrix display with configurable backlight color Standards: UL 916, Canadian standard C22.2, FCC, class B, part 15 radio emissions, IEC 61000-4 electromagnetic compatibility