1. SECC steel plate and fine powder baking paint treatment are used externally; Internally made of SUS stainless steel 2. New high-temperature resistant long shaft motor 3. Turbofan 4. Silicone packing 5. Overtemperature protection, overload automatic power-off system 6. Circulating system: forced horizontal air supply circulation 7. Heating system: PID+S.S.R 8. Temperature controller: PID microcomputer control, fully automatic constant temperature, rapid temperature compensation function 9. Timer: When the temperature reaches the timer, it will trigger a power-off alarm indicator 10. Glass windows can be selected according to customer needs, and customized according to customer specified specifications