Portable Hanging Neck Fan Cooling Heater Heating Air Conditioner Fan Wearable Neckband Leafless Fan USB Rechargeable Fan Features: 1. Refrigeration and heating: upgrade the principle of cooling and heating, intelligent chip control temperature, cooling and heating provides three-level function options, powerful functions. 2. Principle: The temperature is transmitted from the body through the neck to the head. This refrigeration device eliminates the heat of the neck, thereby achieving a cooling effect. 3. Mute: using silent cooling technology, after the cooling function is turned on, the noise is low, and it is cool and comfortable. 4. Real-time temperature control: The product is equipped with two highly sensitive detectors, which can intelligently control the temperature at the degree you adjust to maintain a constant temperature according to the algorithm. This hanging neck fan can cool and heat in 3 levels, has a long battery life, and also has an atmosphere light function. Specifications: Battery capacity: 2600mah Battery life: 1st gear: 6-7H, 2nd gear: 4-5H, 3rd gear: 3-4H Input: 5V/2A, TYPE-C Charging time: 3 hours Power: 5W Cooling / heating: 3 gears Material: fireproof ABS+silicone Size: 175*145*40mm Packing: color box Package Included: 1 * Hanging Neck Fan 1 * Charging Cable 1 * Manual Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.