The bed cooling fan directs airflow beneath your sheets, providing personalized cooling for one side of the bed. Its quiet modes (Levels 1-2) deliver a gentle breeze that won't disturb your partner, making it ideal for couples with different temperature preferences. Features five speed settings: Levels 1-2 offer low-noise sleep modes; Level 3 is for daily cooling; and Levels 4-5 provide rapid cooling. Easily switch from a gentle nighttime breeze to powerful cooling to quickly dispel stuffiness and circulate cool air, reducing heat and humidity buildup under the covers. The telescopic stand adjusts from 22cm to 53cm (8.66–20.87 inches), ensuring precise airflow delivery beneath the bedding. It maintains stable, efficient cooling performance whether used with low-profile beds, standard mattresses, or extra-thick ones. This under-sheet fan includes a 1-6 hour timer and 5-speed adjustment, controllable via remote or touch panel. It features a built-in 10,000mAh rechargeable battery but also supports plug-in operation. Place it wirelessly at the foot of the bed for a comfortable night's sleep. Service: We place great importance on our customers' shopping experience! If you have any questions, please feel free to contact us, and we will reply within 24 hours.