These are pretty rare I'm told. Had this unit over 15 years. In good shape for its age. Machine works as it should. Decent depth but not as deep as some newer units. It runs on 8 AA batteries and goes through some battery check when on. Has a light the roams back and forth on the display screen and then stops on the ID that it thinks it's over. Looks like K.I.T.T. from Knight Rider! Machine has various audio ID too. I don't have the owners manual. Pretty simple to use. 4 buttons:#1 on/off and sensitivity,#2 notch,#3 notch width,#4 discrimination. Machine also has a pinpoint button. The arm rest has 2 ports for headphones. One is 1/4" and the other is 1/8". Asking $170 shipped lower 48. PayPal friends and family. Feel free to email me any questions. Also still have the older Minelab Sovereign rod lowered to $49 shipped lower 48.