... energy use 3.Digital controls 4.Compact size High quality digital melting furnace machine NAP-MF-HK4 DetailsPower supply: 380V/50/60Hz ... full load, 24 hours continuous working.6,Quick temp rising, electricity saving, low melting cost with high cost efficiency.7,Cabinet casing ... and low weight, easy operation, simple and convenient maintainance. High quality digital melting furnace machine NAP-MF-HK4