Double Automatic Watch Winder Choose clockwise, counterclockwise or bi-directional rotation. Automated rest periods prevent overwinding. Elegant case with glass display top holds two watches Power adapter included For use with self-winding watches only. Moves clockwise, counter, or bi-directionally Built-in timer prevents overwinding Built-in timer prevents over winding Solid wood case Power adapter included Input: 100-240VAC, 47-63 Hz, 1A Output: 3.3VDC, 2A, MAX 6.6W