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Specifications: Product Name: neck fan Size: 290 * 190mm Battery model: 18650-3.7v Battery capacity: 1200mAh Charging input: DC 5v-1a Charging time: 4H Working time: 4.5h-8h Weight: 168g Features: Hand Free Design: Neckband fan is adopted with hand free design, you can hang the fan around your neck and take it everywhere, not will feel tired or uncomfortable when you hang the fan for a long time. 360° Rotate Fan: Hand free cooling fan is adopted with double heads design, and two fans can 360° flexible rotate, which allow you to adjust the best wind direction, simple and easy to create powerful wind for yourself. Speed Adjustable: Hand free personal fan 3 different speed level can adjust, low, medium, high, just need to press the power button to adjust. 4 Colors Optional: Mini neck double fans are built-in 1200mAh battery, can quickly charging and long time using, Black, Pink, White, you can according to your likes to choose. Widely Application: Ideal for personal cooling, camping, outdoor event, such as soccer and baseball, camping, climbing, fishing, golf, festival, makeup, etc. Function Buttons: 1. Long press three seconds (turn on / off) 2. Touch key, cycle switching speed. 3. Working: blue light flash. 4. Charging: red light flash. 5. Full of electricity: blue lights bright. 6. Electricity shortage: red light flash. 1. Press and hold for 3 seconds to turn on the fan and enter weak mode. 2. Press stroke mode again 3. Press the third time, it is strong wind mode 4. Press again to turn off the fan.