Dry and constant temperature: the shoe dryer has a built-in PTC heating element that can destroy the living environment of shoe microorganisms through high temperatures and drying and achieves the effect of inhibiting the growth of microorganisms while simultaneously removing odours. Say goodbye to the micro-organisms caused by sweating while running and solve the worries of wet shoes on the road of life with our shoe dryer.Ring heating: the portable shoe dryer has a ring-shaped design. There are two heating elements on both sides, and the surface is enlarged for drying, which dissipates heat evenly, accelerates evaporation of moisture and allows wet shoes to dry quickly. The ring-shaped design is also suitable for other shoe models and socks, such as cotton pug, snow boots, trainers, etc.Porous heat release: with the 1532 heat dissipation holes, holes in the shoe dryer are densely distributed. When heating, a ring-shaped hot air flow is formed in the shoe compartment, 360 heat evenly distributed taking into account the sole and shaft and the dead corners can also be dried evenly.Time setting: for shoes made of different materials, thickness or moisture, you can set the 3/6/9h timer to turn it off. Let the multifunctional shoe dryer run safely and quietly. Precise timing can protect your beloved shoes from overheating. At the same time, you have even more time after drying your shoes to enjoy a comfortable shoe wearing experience.Fireproof: the shoe dryer is made of ABS UL94 V0 fire retardant materials. Compression and high temperature resistance, not easy to burn and deform during use. The product size of the shoe dryer corresponds to the size of your palm. It can be easily stored in suitcases or carry-on luggage. It is very suitable for travel or family use, so it does not get cold this winter.