【Dual Power Efficiency for Non-Stop Cooling】This solar rechargeable peak cap supports both high-efficiency solar charging and USB power, ensuring consistent and reliable cooling performance whether used outdoors or indoors 【Adjustable 3-Speed Quiet Powerful Fan】This baseball cap with solar fan features an upgraded motor with three adjustable wind speeds and an adjustable fan angle for targeted airflow. It delivers strong, steady breeze while operating ultra-quietly 【Sun Protection & Breathable Design】This USB & Solar powered breathable fan cap designed with breathable mesh panels, this sport cap promotes ventilation and comfort. The lightweight structure helps reduce heat buildup. 【Comfortable Universal Fit】This cap with fan equipped with an adjustable hook-and-loop strap for a secure, comfortable fit that suits most head sizes 【Portable & Versatile Outdoor Companion】Lightweight and compact, ideal for golfing, fishing, hiking, camping, sports, gardening and outdoor work. It also serves as a practical gift for summer use