Gwinstek GPC-3030 , GPC3030D , Toward 6303D, TPS-4000 Dual tracking Power SupplyThese Gwinstek GPC 3030 *1 unit , GPC3030D *1 unit , Toward 6303D *1 unit , TPS 4000 *4 units Power Supply were production surplus, we ordered it from an ICT component manufacturer company Spec: 30V 3A, 100Vac~240Vac Status: Tested, good working condition There are 4 models to sell individually, Gwinstek GPC 3030 *1 unit , GPC3030D *1 unit , Toward 6303D *1 unit , TPS 4000 *4 units DC Power Supply Pls let's know which model you are going to order