ZK03 Digital Display Cooling Fan USB Silent Handheld Cold Compress Fan 1. 3-speed adjustable fan, powerful airflow 2. Semiconductor cooling, smooth aluminium alloy surface, cool and refreshing 3. Long battery life, can be used for a long time after a full charge 4. Foldable base, can be placed on a desk, does not take up space 5. Compact and portable, with a lanyard design for easy carrying 6. Features a smart display screen to monitor battery level in real-time 7. Multiple usage modes: handheld, neck-worn, or desktop use Specifications 1. Speed settings: 3 levels 2. Input voltage: DC 5V1A 3. Battery capacity: 2000mAh 4. Power: 5W 5. Charging time: about 3 h 6. Usage time: about 10 hours on the first gear, about 4.5 hours on the second gear, and about 2.5 hours on the third gear 7. Material: ABS + aluminium alloy + electronic components 8. Size: about 5.24 x 4.94 x 15.67 cm 9. Weight: about 147.7g