853D 3 in 1 Soldering Station, Hot Air Rework Station and DC Power Supply Two LED digital displays to show precision temperature One LED display to show the mobile RF signal and testing voltage ID microcomputer control, over-temperature, short circuit, open circuit, overload protections Automatic cooling function for effectively prolonging the heater's life and protecting the hot air gun Handle with sensor switch features access operating mode when picks up or standby mode when lays down