【Powerful Battery】 3000mAh capacity ensures long-lasting use, with up to 5.4 hours on the lowest setting. 【Multiple Speed Settings】 Five adjustable speed levels ranging from 12,500 to 16,000 RPM for customized airflow. 【Compact Design】 Pocket-sized dimensions of 138mm x 59.5mm x 40mm make it perfect for on-the-go use. 【Quick Charging】 Fully recharges in approximately 4.1 hours via USB for convenience. 【Intuitive Controls】 Long press for power on/off, short presses to adjust speed, with LED indicators for each mode. Specifications: Battery Capacity: 3000mAh, 3.7V Input Voltage: DC 5V Charging Current: 1A Fan Operating Current: Level 1 - 0.52A, Level 2 - 0.59A, Level 3 - 0.69A, Level 4 - 0.79A, Level 5 - 1.03A Fan Power Consumption: Level 1 - 1.82W, Level 2 - 2.18W, Level 3 - 2.55W, Level 4 - 2.92W, Level 5 - 3.81W Battery Life: Level 1 - 5.4h, Level 2 - 4.8h, Level 3 - 4.1h, Level 4 - 3.5h, Level 5 - 2.7h Charging Time: Approx. 4.1h Standby Current: ≤20µA Motor Speed: Level 1 - 12,500rpm, Level 2 - 13,500rpm, Level 3 - 14,500rpm, Level 4 - 15,500rpm, Level 5 - 16,000rpm Wind Speed: Level 1 - 3.24m/s, Level 2 - 3.94m/s, Level 3 - 4.30m/s, Level 4 - 4.82m/s, Level 5 - 5.36m/s Noise Level: Level 1 - 62dB, Level 2 - 66dB, Level 3 - 69dB, Level 4 - 71dB, Level 5 - 74.5dB Material: ABS + Electronic Components Dimensions: 138 x 59.5 x 40mm Charging Status: When charging, the red indicator light turns on, and the charging current is 1A. When fully charged, the red indicator light turns off. Fan Button and Indicator Light Status: Long press the + button for 2 seconds to turn on the fan at Level 1, and the working indicator lights up white. Short press the + button once to switch to Level 2, and the working indicator lights up green. Short press the + button twice to switch to Level 3, and the working indicator lights up orange. Short press the + button three times to switch to Level 4, and the working indicator lights up blue. Short press the + button four times to switch to Level 5, and the working indicator lights up red. Long press the + button for 2 seconds at any time to force shutdown. Short press the - button to decrease the fan speed in the order of 5 → 4 → 3 → 2 → 1.