2024 Newly Silent Powerful FanFUNME's exclusive patented hand held fan is different from traditional monotonous fan products. It aims to create a product with loud wind and light sound and supports more than 4000rpm revolutions per minute under 40db, 500rpm/M faster than other similar handheld fans. Don't you fall in love with this funme hand-held fan with loud wind and light sound? Update 1: Up to 20 Hours of UseBuilt-in rechargeable 5000 Battery operated, comes with a USB cable for easy charging and use. Capacity increases to 4-20 hours of cordless use. Portable personal Powerful fan cooling with foldable handle for easy handling as well as transport in bags and purses. Charging time: 3.5 - 4 hours. Updated 2: 4 Speed WindWhen your baby is sleeping, you can choose our speed 1 (2.5m/s-2100rpm) which is suitable for a quiet environment; if the child is studying in the study and the adult is working in the office, you can choose our speed 2 (3.3m/s-2500rpm);