Increase the ventilation in your tent with this lightweight tent fan from O2. This powerful 10" two-speed multi-position fan is quiet even at high speed. Strong magnetic plate attaches easily to tents and canopies. Adjustable height feature also makes this fan a great choice for desk use. 12V DC adapter connects to your vehicle or the included battery pack. This battery pack can also be used as a charging station for your electronics. Battery pack runs up to 24 hours on 8 D-cell batteries (not included).