【Thermal Protector & Heat-Sensitive Sticker】: Comes with a power switch with a temperature adjustment range of 122~167℉/(50~75℃); Effective radiant heat range within 40 cm. The heat-sensitive sticker will alert you to the condition of the temperature. (This sticker is black for temperatures below 45℃/ 113℉ and red for temperatures above 45℃/ 113℉).【Energy-efficient Design】: Reducing electricity use is our eco-friendly design philosophy. The power consumption is ONLY 140 Watts makes it more energy efficient than most of others.【UL Test Stand