Product characteristic: 1. In the workroom, the hot air is convective naturally and cyclically. 2. PID micro-computer intelligent temperature controller with functions of over-temperature protection. 3. Standard highlight LED instrument running light. 4. New anti-hot handle. WHLL-BE series have the following characteristics other than the above functions. 1. LCD temperature controller. SSR to make sure the safety 2. Over-temperature protection system 3.High precision digital independent temperature limiter