... automatic feeding, feeding system are optional;2,There are 3 independent heaters. The 1st and 2nd hot-air ... alarming all can be displayed on the touch screen.3,High-precision K-type thermocouple with closed loop control, ... pressure and optical sensors. to control the pressure in 3-10 grams and optical switches, so that it can ... good for large PCB board(laptop, mother board, xbox), bga repair system