Utilizing a semiconductor cooling module, the metal surface quickly lowers temperature, offering rapid cooling when in contact with the skin The wind speed can be adjusted steplessly, allowing users to customize the airflow according to their preference for optimal comfort Equipped with a silent motor that operates quietly, ensuring a peaceful and undisturbed cooling experience, perfect for use in any environment Designed with a practical hanging hook, allowing users to easily hang the fan on various surfaces for hands-free cooling Fan working mode: Double-click the wheel switch to power on. By default, the fan starts at speed level 1. The screen displays "1" and the fan icon lights up. When powering on, flick the wheel switch upward once to increase the fan speed by one level. The screen displays the corresponding speed level. If there is no operation for 4 seconds, the screen switches to display the battery level. Keep flicking the switch upward without releasing it to continuously increase the speed level. It stops increasing when it reaches level 100. When powering on, flick the wheel switch downward once to decrease the fan speed by one level. The screen displays the corresponding speed level. If there is no operation for 4 seconds, the screen switches to display the battery level. Keep flicking the switch downward without releasing it to continuously decrease the speed level. It stops decreasing when it reaches level 1. Double-click the wheel switch again to stop the fan. Instructions for Use: Cooling Mode: Long-press the button for 2 seconds to activate the cooling mode. The cooling icon lights up on the screen. After activating cooling, the fan can only operate at up to level 50. Long-press the button again for 2 seconds to deactivate cooling. Cooling cannot be activated independently and can only be turned on when the fan is operating. Charging Mode: During charging, the screen displays the battery level, with the last digit flashing. When fully charged, it displays "100". Full Charge Usage Time: It takes about 4 hours to fully charge the device. Usage time on fan mode: 15 hours at level 1, 5.5 hours at level 50, and 2.5 hours at level 100. Usage time on cooling mode + level 1: 2-2.5 hours, and on cooling mode + level 50: 1.5-2 hours. This product supports charging while in use. Specifications: Product Model: Y51 Materials: ABS/metal/PC electronic components Product Dimensions: 54*53*165mm Battery Capacity: 3000mAh Input Voltage: DC5V Input Current: 2A Execution Standard: GB 4706.27.2008 Package included: 1 x Fan 1 x Power Cable 1 x Certificate 1 x English and Chinese User Manual