MULTI 3WAY SQUARE FAN Can be used in 3 ways: tabletop, handheld, and neck-worn. - Size: Main unit/approx. 7 x 2.5 x 14.3cm - Power source: Uses 2 AA alkaline batteries (sold separately) * Manganese batteries cannot be used. - Continuous operating time: Approximately 8 hours Thank you for viewing. I received this when I went to donate blood. I am selling it because I don't use it.