... of the single chip, SMT surface paste mounting, PID auto-tuning algorithm, electromagnetism compatible design, etc.>>Features Appearance is ... the instrument wiring is reliable. Adopt SMT technology, PID auto-tuning algorithm, electromagnetism compatible designin the combination of hardware ... SSR or control the logic circuit):12V/30mA,0-10mAContact type for large power:16A/250VAC(for resistance load) ...