... )Over voltage protection: 246V±4VFrequency: 50Hz/60HzUsage area: computer, copy machine, testing equipments, lighting equipments, TV equipments, medical equipments, communicating equipments, industrial ... 7VLow voltage protection: 318V±7VFrequency: 50Hz/60HzUsage area: computer, copy machine, testing equipments, lighting equipments,TV equipments, medical equipments, communicating equipments,industrial ...