1,Physics electricity lab is applicated in school 2,High quality, safety, easy to operate, green physics lab equipment Main ... protection, reset button d, Two way AC 220V outpute, DC high voltage output, 240V-300V two grade, 100MA , with auto overcurrent ... .c, two channel AC 220V voltage output, 5A current, with high sensitive short-circuit protection.d, accessory equipment: Voltmetre, ampere metre ...