The Husssh USB Rechargeable 10" Air Clip On Fan is designed to go anywhere you need and provide the right level of comfort while doing it quietly. The Air Clip On fan is ideal for all types of spaces, including RV's, Campers, Tents, Beach Chairs, Poolside, Office Space, Strollers, or even at home. The 4000 mAh large capacity batteries provide 4-15 working hours duration, depending on speed selected and fully recharges in less than 3 hours.