1、It can be used by charging through USB power supply, or used without power supply, more convenient to carry when traveling. 2、It can be used as a charging bank with a large capacity of 2000mAh, can charge your mobile phone. 3、With three wind speed level, low-grade use can be up to 10 hours, provide better use feeling. 4、Made of high quality ABS material, firm and durable, not easy to break, provide longer service life. 5、With lanyard design, can be hang on your neck for using, more portable, provide better use feeling. 1 x Hanging Waist Fan1 x Lanyard1 x Fixed Belt1 x Stainless Steel Frame1 x USB Cable1 x Instruction Item Type: Lanyard Hanging Neck FanMaterial: ABSSize: Approx. 13x 8.5x 4.5cm/ 5.1x 3.3x 1.8inWeight: Approx. 241g/ 8.5ozColor: PinkBattery Capacity: : 2000mAh/18650 (built-in battery)Motor: 2100 RPM to 3000 RPMBattery Voltage: 3.7VInput: 5V /1AOutput: 5V / 1AOperating Current: 0.2A- 1.4AWorking Power: 1W-7WInstructions: The fan is adjusted in three level. The first time you click the key is in low gear, the second time you click the key is in middle gear, the third time you click the key is in high gear, and the fourth time you click the key is to close the fan.