... 260 temperature. Main appliances: hair straightener, hair crimper, wax melting heater, humidifier, water boiler, liquid warmer, coffee warmer, polymer press- ... 1) After switching on, the heating power is large, and then decrease, finally it become steady state. The steady state ... may be instable. 4) It operates in long life, and has excellent insulation on high voltage. The surface temperature increases ...