Thank you for viewing. Instant purchase is welcome. Please only purchase if you understand that this item is stored at home. [2023 U-V Enhanced Version] Mask Fan 3~5℃ Cooling Mask Air Fan Sterilization Mask Fan Portable 20g Ultra-Lightweight Portable Air Purifier 3 Modes of Airflow Adjustment 25db Silent Design Cold Air Fan 3H Continuous Operation USB Cable Included Small Dehumidifying Fan Suitable for Mask Stuffiness/Heatstroke/Pollen/Countermeasures Outdoor Work/Subway/Outdoor Sports/Commuting/School/Outdoor Activities, etc. Japanese Instruction Manual [2023 Mask Fan] The USB rechargeable small fan quickly expels exhaled hot air, addressing skin inflammation caused by the summer heat and foggy glasses due to winter humidity. [3-Stage Airflow Adjustment] Designed to extract heat from the mask and circulate air. 1. Mode: Normal wind speed. 2. Mode: Enhanced wind speed. 3. Mode: Intermittent wind speed. [Type-C Fast Charging] Applicable to most household charging interface types, 30% faster than Micro USB charging, and can be charged in just 1 hour. Charging: Red light on, Fully charged: Light off. [270 mAh Large Capacity Battery] Can be used for about 3 hours at normal wind speed, about 2.5 hours at enhanced wind speed, and about 4 hours at intermittent wind speed. [25 db Silent Design] You won't feel the operating noise of the mask fan at all, whether you're walking outdoors, working in the office, or studying in the classroom. 3-451399