1) 2 or 3 power heating element 2) Indication lights on control panel 3) Adjustabl temperature 4) Water proof IPX4 Introduction:* Company history: established in 2004 professional manufacturer specialized in heaters:* Industrial fan heater, ceramic heater, kerosene heater, convector heater, quartz heater etc.* Main markets: Korea,Japan,iraq ,Dubai ,Denmark, Norway, Sweden, Finland, UK, Russia, ...