The Delta 4000 from Teknetics has a large control box which features push-button controls, numerical depth read-out, a simple menu system and a running depth indicator. These tools combine to help the beginner get started in the hobby. Advanced features include adjustable sensitivity, discrimination, digital target identification and two search modes:
Discrimination mode.

 

All Metals mode. There are six discrimination categories on the Delta 4000 that allow the user to make changes to the factory discrimination settings. When you're out in the field, simply select the discriminate mode and then use the up or down arrow button to make any changes.
The Delta 4000 requires just one 9v PP3 battery. The battery life indicator will make sure you’re able to hunt for hours on end.