1. Product The portable fan is equipped with built - in USB charging. Once fully charged, the fan can be used without being constantly connected for charging. It can be charged via a USB charger, laptop, mobile power, or car mobile power. The fan has a spiral design, which helps with a better distribution of fresh air in the room. Day and night: At minimum power, this fan emits a powerful yet silent jet of air. Our small air - conditioning system is environmentally friendly and energy - efficient. You can use the USB cable to charge the battery. The mini air conditioner is very convenient to carry around and can be used outdoors, even when the whole family is on a business trip. This portable fan is suitable for various scenarios such as family use, in the kitchen, during travel, outdoor activities, in the office, for personal cooling, sports, running, sitting, and reading. It also makes a good personal table fan. 2. Specifications - Material: ABS - Duration: 5h - 5V - 1A input - Battery Capacity: 2000mAH - Product size: 179*92*89mm - Water tank capacity: 240ml 3. Caution - Only add tap water or ice water. Adding ice cubes or ice water can enhance the cooling effect. - Do not tilt the small air cooler when it contains water. - Please note that there may be some tolerance in manual measurement, approximately 3cm/1.18in. - Due to screen differences, the color may vary from what you might expect. 4. Packing list - Air Cooler x1 - USB cable x1