Drive unit with sliding frame

What powers the machine

and feed rate as necessary

9-V batteries

Garrett 1/4" Headphone Adapter for Garrett AT Pro, Infinium & Sea Hunter Models - 1626000 GOLDBUG-PRO Drive unit with sliding frameAllows land use headphones with a 1 4? male jack to be used with the Garrett AT Gold, AT Pro, Infinium and Sea Hunter models. (Not intended for submerged use.) OPERATION NOTES: Inserting the headphone plug into the connector will provide sound from the headphones only and will automatically disable the detector's speaker. This automatic speaker disable feature requires the input impedence of the headphones to be 10,000 ohms or less. Note that some non