Weller WESD51 Digital Soldering Station Station includes WESD51PU power unit, PES51 soldering pencil, ETA tip and PH50 stand with sponge. Add distilled water to the sponge for it expand to the size of the opening in the stand. Microprocessor controlled temperature: 350F-850F (175C-450C) Digital LED display provides temperature setting and actual tip temperature readout in degrees F or C. Iron is fitted with a non-burnable silicon rubber cord for safety Auto power-off after 99 minutes of inactivity saves power and extends tip life Designed for continuous production soldering - Temperature setting can be locked to prevent unwanted changes