WT21 Handheld Cooling Fan Foldable Ice Pack Fan With Battery Level Display 1. Powerful airflow, motor speed up to 10,000 rpm, airspeed up to 5 ms 2. Cooling face mask, semiconductor cooling, stronger cooling performance 3. 180 degree foldable, multi-angle airflow 4. Can be placed on a desk, suitable for office or study use, compact and convenient 5. Comes with an adjustable strap 6. LED smart display screen for real-time battery level monitoring 7. 3600mAh lithium battery for extended runtime. Multi-layer cell protection for safety and reliability 8. Type-C charging port and USB output port, compatible with various charging devices Specifications 1. Speed settings: 100 levels 2. Input voltage: DC 5V 3. Battery capacity: 3600mAh 4. Power: 5W 5. Charging time: about 4 h 6. Usage time: - Display 01: about 11 hours and 20 minutes (with cooling turned on for about 2 hours and 30 minutes) - Fast mode 25: about 8 hours (with cooling turned on for about 2 hours and 20 minutes) - Fast mode 50: about 4 hours and 40 minutes (with cooling turned on for about 1 hour and 40 minutes) - Fast mode 75: about 2 hours and 20 minutes (with cooling turned on for about 1 hour and 30 minutes) - Fast mode 100: about 2 hours and 15 minutes (with cooling turned on for about 1 hour and 25 minutes) 7. Material: ABS + aluminium alloy + electronic components 8. Size: about 5.7 x 5.3 x 17.4cm 9. Weight: about 224g