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7V Product material: ABS+PC+Electronic components Appearance size: 226 * 198 * 56mm Package Includes: 1 *Neck fan Attention: If you have any questions please feel free to contact us and we will reply as soon as possible.With 4000mAh bartteries and double turbine motor design it will last longer and provide high-velocity wind. 360° surrounding cooling air supplied.0 inches (W) x 9.