O2Cool Deluxe Necklace Fan isperfect for cooling on-the-go. We offer a variety of products that provides a cool breeze and misting all in the palm of your hand as well as a necklace and clip fan for hands free cooling. The fans can be carried in your purse or pocket. Powerful one speed motor with internal 2.5 inch fan bladeColor coordinated break-away lanyardCompact design makes it great for travel; easy to carry and storePerfect for outdoor activities or indoors at a theater, school or sporting eventUses 2 AA-Cell batteries (not included)Blade size: 2.5-inchesNumber of speeds: 1Assorted colors only