2)Temperature control knob (cleaning liquid temperature setting), Timer control knob (cleaning time setting)
3)START/PAUSE & Memory button, On/Off button.
4)Degas button
Degassing is the removal of dissolved oxygen trapped in a liquid. In ultrasonic cleaning systems, trapped, dissolved oxygen in the ultrasonic cleaning solution will hinder the ability of the system to clean. This dissolved oxygen must be removed from the system by de-gassing.