EnergyPlus 1600 Watt 120 240 Volt In Wall Electric Wall Heater in White M14 Hardware The 4 monocrystalline silicon solar nonshrinking cement grout Frequently The 4 monocrystalline silicon solar panels are protected by weather resistant tempered glass and a second cleanable clear plastic shield 25 in Box Size 1 3 4 in Manufacturer Warranty Limited Lifetime Warranty Pack Size 1 Returnable 90 Day Opening Size x Square Socket Sizes 3 4 in Thermal safeguard protection is a high temperature manual reset that turns off the heater if normal operating temperatures are exceeded Night or away button allows you to pre set a setback temperature so you can adjust with just 1 touch