Portable Lightweight Smart Timer Constant Temperature Deodorizing and Antibacterial Electric Shoe Dryers. Constant-temperature quick drying; PTC constant-temperature heating,3-level timer settings (4H/8H/12H),Extendable/retractable length adjustment,Built-in UV sterilization and disinfection. Lightweight and portable; a year-round essential with a smart timer function. Deodorizes and sterilizes; durable casing. PTC Heat Generator Sustained high heat! Precise temperature control to prevent overheating.