The Control Panel contains the machine’s on/off switch, along with an amp meter which lets the operator know exactly the correct speed/pressure to operate the core rig at. Proper use of the amp meter increases productivity and maximizes core bit life. This Dual Switch model Control Panel has a separate on/off switch for the vacuum pump and the drill motor. This feature allows you to anchor the rig by setting the vacuum first, then operating the drill motor. The amp meter has three red lines; for use with 15 amp, 18 amp and 20 amp motors. Comes with 30 amp plug end.