... alarming all can be displayed on the touch screen.3,High-precision K-type thermocouple with closed loop control, PID auto-tuning ... other external devices (such as computer).12,powerful cross-flow fan to cool the PCB board automatically after desoldering and ... meet the requirement of lead-free process. hot sale, high precision, high autoZM-R6821 good for large PCB board(laptop, mother board, xbox), bga ...