NKL Portable : Unique portable fan design, creative style, made of high-quality ABS, has a solid structure and pressure-resistant So Cool : Beautiful Fans, Great travel fans for cooling or beauty in hot weather activities like sun bathing camping USB Rechargeable : Rechargeable battery operated fan, the USB powered fan comes with a rechargeable 1200 mAH Li-ion battery, can be charged by USB charger, computer, power bank Adjustable Speed : Be free to turn down or turn up the air speed. This fan comes with two speed settings- Normal and High Speed High Performance Low Disturbance : Fan is superb in performance but doesn't want to make any sound about it, you will be using this fan without hearing any noise from this power pack product.