There is ZERO AIR LOSS for this top-rated portable fan. It does a great job moving air around the neck and face! Doesn't blow your long, curly hair around nor get tangled in it. LED DISPLAY AND 4 SPREEDS ADJUSTABLE You can easy to know how much battery life you have left and the current speed. One Button Control that you can change the speed you want easily. Adjust appropriate fan speed by pressing the power button repeatedly. LONG-LASTING RUNNING TIME - Equipped with a powerful and rechargeable 2400mAh battery, this fan offers up to 6-20 hours of use (depending on different speeds). Easy to charge with USB so you can charge it anywhere theres USB charging port. LOW NOISE PLENTY OF AIRFLOW - It made with good, quality materials with a quiet motor and bladeless design. This fan was quiet enough to not distract from the lecture and you can speak to people even if it's on high. This is your secret weapon to combat the hot flashes. LIGHT WEIGHT & COMFORTABLE - it's lightweight and easy to carry around and is in no way heavy on the neck, well made and sturdy. The design is great for any size of necks, does not hinder neck movement while driving or exercising. It is perfect for taking to amusement parks, the beach, on walks etc.