Model Number: DX540H Brand Name: DOTECH INC. Key Specifications/Special Features: 1. Main features:- Adoption RISC MICOM with high reliability- Easy to maintain and analyze troubles of equipment by storing 160 trip alarms log- Best calculation function of defrosting timing by various combination of 8 sources- Embedded day-timer to enable energy-saving operation- Easy expansion due to various analog transmission output function2. Models:DX540H-00DX540H-11