Adopting Automatic Power Compensation(P.A.C.) system to maintain stable power when cutting tissues with different impedance. The max output power is 150w. Five working mode: automatic cut, blended cut, tender coagulation, force coagulation and bipolar coagulation. Footswitch or on/off button on ESU pencil. The YH150 electrosurgical units are designed for use in minor and medium surgery. Advanced electronic technology has been utilized in its manufacture and micro processors open a new era in the field of electrosurgical units, which guarantee maximum safety with optimum performance. Maximum safety is so ensured through built in automatic diagnostics which continually measure power delivery and activate a cut -off in the case of any excess. Economic ESU applied for microsurgery, cosmetic surgery dental s. etc.