Adjustable Airflow Stepless Airflow Control! Lightweight and High Airflow! 【Specifications】 Model Number: HDL-3921 Airflow: Seamless Control (Minimum Airflow: 2.0m/s, Maximum Airflow: 4.0m/s) Battery: Lithium-ion Battery 2000mAh (3.7V 7.4Wh) Power Supply: DC5V/1A Rated Power Consumption: 8W Charging Port: USB Type-C Charging Time (approx.): 3 hours Operating Temperature: 10～45℃ (Charging Humidity: 10～40℃) Accessories: Strap, Charging Cable (USB Type-C), Instruction Manual Warranty Period: 6 months 【Precautions】 ● If you notice any abnormalities such as heat during charging, immediately unplug the charging cable and stop charging. ・ Continuing to charge may cause smoke, fire, or explosion. ● Discontinue use if the following symptoms occur: ・ The product is abnormally hot. ・ The product has deep scratches or is deformed. ・ There is a burning smell. ・ You feel a tingling sensation of electricity. ・ Problems such as the device not working when the switch is turned on. ● Charge in a place where the charging cable will not be stepped on, caught on, or subjected to excessive force. ・ This may cause smoke, fire, or electric shock. ● Check the charging cable and all other parts for damage, proper installation, and any other issues that may affect operation. ・ Do not use if there are any abnormalities. ● If you feel that the product is not working properly or experience any abnormalities during use, immediately turn off the switch and stop using it. ● When not in use, store in a dry place out of the reach of children. ● During use, prevent hair from getting caught in the rotating parts. ● If you feel any abnormalities on your skin when using the cooling plate, stop using it immediately. ● Do not disassemble, repair, or modify this product. ● Do not use this product for purposes other than its intended use. ● Do not use this product when it is wet or in a humid place. ● Do not touch the main unit or charging cable with wet hands. ● Do not charge with water or dust on the plug of the charging cable. ● Do not use or charge in areas with flammable gases, liquids, or dust. ● Do not subject to strong impacts or vibrations, or drop the product. ● Do not allow people who cannot operate it correctly to use it. ● Do not use or store near small children or pets, and do not allow small children to use it. ● Do not carelessly touch any liquid leaking from the battery inside the main unit. ● Do not throw the main unit into a fire or heat it. Thank you for viewing.