Appearance introduction 1. Compressors imported from Japan 2. Super wind speed blower 3. Independent noise reduction system 4. -30°C super-low temperature refrigeration 5. 200g super light cold air tube 6. Stepless speed regulation, temperature adjustment knob 7. One-key start-stop button Operator station introduction 1. Stepless speed regulation, temperature adjustment knob 2. Temperature  indication（-4℃~-30℃） 3. Strat-Stop button