We introduce in the medical sector a new microprocessor based Electro Surgical Generator-SMART 4. It excellent performance of monopolar (cut & coag) and bipolar modes. Integrated with microprocessor controls, this ESU provides user safety to the user during surgery and is ideal for surgeries that require high precision and reliability. Spray coagulation is an internal part of this surgical unit that gives a good hemostasis effect with minimum cutting effect.