Double use: holder and clip on the fan. Strong clip with pads, non-slip and won't damage your furniture. Can be put or clipped anywhere, great for baby stroller, home and office, laptop, gym workout, car backseat, buggy, outdoors, camping , travel and anywhere cool wind is needed. 2 Power Modes: Our USB silent fan can be powered by 1* battery (included - NOTE: Battery exterior color may vary from batch to batch to another) - rechargeable and replaceable. Mini USB fan can also be powered by USB cable, compatible with computers, laptops, power banks, wall and USB chargers 3 wind speeds: just press the button at the above the fan to easily adjust the speed mode. The USB desk fan has 3 speeds with 360 rotation, can be fully rotated and tilted at any angle, the airflow reaches the right place. Small but mighty: 17*14.5 * 11.5 (6.9 * 5.7 * 4.5 inch), convenient small USB fan, lightweight. 3-6 hours working time depends on speed for long term use. Life Saver on Hot Summer: USB portable fan brings plenty of cool air, keep you cool from heat wave in summer.