Specification:  ST-965 Soldering station: Temperature locking,temperature calibration and temperature alarming function Password protecting function and temperature unite switching function Buttons(1,2,3) for pre-setting or switching frequentlyused temperature New design with LCD display screen making control visualization Automatic standby ,shutdown with smart time setting MCU controlled temperature calibration Beep alarm function available Security sticker Copper transformer Pluggable heater SMT Process   Define button:  "& 9650;" add value ,"& 9661;" decrease value That shortly press button change value slowly,long press button change value rapidly Long press both key "1" and "3" at the same time to enter into menu mode Key "2" means save or confirm 3 groups of preset key Key "1" ,"2" and "3" is 3 groups of preset key Set preset value by long pressing key key "1" ,"2" or "3" under working status   Menu set:  LOC:Temp lock function C-F:Temp switch °C/°F CAL:Temp cailbration +/- 50°C SLP:Auto-sleep function(1-60mins) OFF:Auto-standby function(1-60mins) H-L:Temp limited alarm function(beep 20~80 °C) PSD:Password protection (01-999 digits) FAC:Reset Application Anti-static funtion by grounding