With a rechargeable lithium battery, powerful Although the fan is small but the airflow is very powerful. It can be adjusted among low, medium, high setting according to your demands. ABS plastic material which portable small and exquisite, easily be put into a bag inside. Perfect for outdoor activities and travel, or just place it on the desktop. The fan can be adjusted from 0°to 180° to satisfy your needs. Practical User-friendly handgrip design & Foldable design. Support the base of the phone to liberate the hands. 4 3/16" L x 8 1/4" W x 1 3/4" H