Electrosurgical Cautery Pencil, Monopolar Button Surgical YNR ESU Disposable PencilsFeatures: Range of Using: Match with Electrosurgical Generator(Unit), Radio Frequency Generator(Unit), and other High Frequency Equipment. Type: D: Disposable These devices are designed to be used as accessories in conjunction with those electrosurgical units and electrodes. These devices are single use supplied sterile. Check plug matching on the generator base and connect. Press the CUT yellow button for cutting and COAG blue button for coagulation.