Features: Anime cartoon style: fresh color fusion classic cartoon image of the lot Absolute safety design: products for the operating voltage 5V, operating current of less than 500MA, computer power supply, is a perfectly safe product Super warm experience: plush slippers combination of far infrared heat to provide a soft touch and comfortable temperature Energy-saving materials science: high-performance materials into heat Flexible matching program: the normal use of USB interface at home, office, car travel in the use USB powered Hot in one minute, then reach the highest temperature in 10 minutes and keep the Hot in one minute, then reach the highest temperature in 10 minutes and keep the temperature betweem 45 and 50 Degree. Approved: CE / FCC