Material: ABS,Output power (MAX):4.5W, Chargering time(H):5 Batteries: 1 *18650Lithium ion batteries required. Clip and table desk type, perfect fan for the office, home, dorm, study, library, games room It is extremely compact, connect to any PC / laptop via USB, or can connect to a AC port with a USB AC adapter With quiet operation, you can keep this by your bedside and sleep comfortably without the noise bothering you 4 inch blade and 6 inch frame saves your desk space; adjust the direction o