... Low energy use 3.Digital controls 4.Compact size High quality digital melting furnace machine NAP-MF-HK4 DetailsPower supply: ... .2,Apply IGBT technology, big output power, stable high efficiency3,With various protection as over voltage protection, over ... high cost efficiency.7,Cabinet casing, compact design with small size and low weight, easy operation, simple and convenient maintainance. High quality ...