1. Cool Summer: 72 air output on the neck, innovative turbine blades and air hole design with the upgraded version of the portable neck fan, 360 versatile air cooling, children and the elderly can use strongly 2. Strong and Ultra Silent: The portable fan consists of a raised engine and a lower machine and a lower machine is formed and creates a lower machine, forms a lower machine and a lower machine and creates a lower machine and creates a lower machine and creates a lower machine and creates an acrot and creates an acrot and makes a lower machine, making noise; The noise level is between 30-55db 3. Three Speed Air Flow: This Bladless fan has 3 mode to make the air flow exactly as you wish: low speed, medium speed and high speed; High speeds are very strong, move too much air and cool you more effectively 4.IsB charge: USB -runable rechargeable neck fan, computer, mobile phone charger, power bank, etc. The built -in 4000mAH battery provides 3.5 to 17 hours of working time (depending on different speed) to be completely charged for about 5 hours