The Electric Heat Mittens are hand warmers designed for use by individuals with arthritis or circulatory disabilities. Designed to bring soothing warmth to hands, improve circulation, and soften skin, the user can insert each hand into a vinyl liner (included), and then insert each hand into the respective warmer. Features include an adjustable heat control system with three temperature settings and washable liners. The warm-up waiting time is 15 to 20 minutes. POWER: The unit is equipped with a plug-in cord that can be inserted into a standard 120-volt alternating current (AC) outlet. SIZES: One size. DIMENSIONS (LxW): Inside dimensions are 10.75 x 5.75 inches. Overall dimensions are 11.5 x 6.5 inches. WEIGHT: 2 pounds. WARRANTY: One year.