FOR sale: Seven Star SS101 300mA 110/220V 60/50Hz Polarity change Battery Eliminator Seven Star SS101 Polarity Change 300mA. Changes AC to DC current so that battery operated equipment can be plugged into any electrical outlet. Saves batteries. Saves Money. Replaces battery power with standard house current on calculators, radios, electronic games, and other battery powered equipment. GOOD LUCK AND PLEASE offer WITH CONFIDENCE IF THERE IS ANY PROBLEM WITH MY ITEM, PLEASE CONTACT ME FIRST BEFORE OPENING A CASE . CUSTOMER SERVICE IS MY NUMBER 1 PRIORITY, I'M SURE I CAN HELP WITH SOLVING ANY SITUATION IF ONE MAY COME UP.