LED DISPLAY AND 4 ADJUSTABLE SPEEDS You can easily find out how much battery life you have left and what your current speed is. One button control so you can easily change the speed you want. Adjust the appropriate fan speed by pressing the power button repeatedly. LONG-LASTING WORKING TIME Equipped with a powerful and rechargeable 5200mAh battery, this fan provides up to 6-20 hours of use (depending on different speeds). Easy USB charging so you can charge it anywhere there is a USB charging port. LOW NOISE LOTS OF AIR FLOW Made of good quality materials with a quiet motor and bladeless design. This fan was quiet enough not to distract from the lecture and you can talk to people even if it is on a high level. It's your secret weapon to fight hot flashes. LIGHT AND COMFORTABLE It is light and easy to carry and does not burden the neck in any way, well made and durable. The design fits perfectly to any neck size, does not restrict neck movements while driving or exercising. Perfect to take to the amusement park, beach, walk, etc.