1. Note: When using the shoe dryer to dry shoes, please place two pairs of shoes at the same time to dry to prevent the machine from leaking. The shoe dryer is suitable for drying sports shoes, various breathable shoes, socks, slippers, hats, etc. 2. Quick Safe Drying: The upgraded warm air system allows this shoe dryer to dry shoes quickly, transferring heat to every corner of the shoes for more even heating. The constant 118F° heating temperature keeps your shoes from overdrying and shrinking. The shoe dryer has four racks and can dry 2 pairs of shoes at a time to improve efficiency. 3. Reduce Odor: The boot warmer comes with four drying racks, two of which are retractable and can be extended by 4in, which can accommodate largesized shoes. In addition, activated carbon is placed in these two drying ports to help you reduce odor while drying shoes, keep shoes fresh and odorless. 4. Wind speed Adjustment: This Shoe dryers for Sneakers has two gears, the high gear is suitable for quick drying of shoes, and the low gear is suitable for socks, gloves, etc. If you only have one pair of shoes to dry, we designed a control knob to close the air duct of the small bracket to concentrate the wind and temperature on the large bracket. 5. Smart Timer: This shoe heater has 1H/3H/6H/timer function, which allows you to set the required working time according to the type and humidity of the shoes, thereby reducing power consumption. In addition, the hot air blower of the shoe dryer adopts an ultraquiet design, which will not disturb your sleep even if you dry your shoes at night.