F75

F70

F5

F4

F2

Gold Bug Pro

Gold Bug II

CZ-21

1280X

1270X

CZ-3D

Gemini 3

User Interface

LCD

X

X

X

X

X

X

Operation Status (non-menu driven)

X

X

X

X

Depth Readout

X

X

X

X

X

X

X

Running Depth Graph

X

X

X

X

Pinpoint

X

X

X

X

X

X

X

X

X

Adjustable Sensitivity / Gain

X

X

X

X

X

X

X

X

X

X

X

X

Knob Control Interface

X

X

X

X

X

X

X

X

X

Visual Battery Life Indicator

X

X

X

X

X

X

X

X

Operation Details

Search Modes

6

3

2

2

1

2

3

3

1

3

5

1

Discrimination Mode

X

X

X

X

X

X

X

X

X

X

X

All Metals Mode

X

X

X

X

X

X

X

X

X

X

X

Transmit Frequency kHz

13

13

7.8

5.99

5.99

19.2

71

5/15

2.4

8.2

5/15

81.92

Target ID

Numerical Target ID System

X

X

X

X

X

X

Non-Numerical Category Target ID

X

X

X

X

X

X

X

Number of Target ID Categories

8

8

8

11

8

7

Discrimination / Notch

Levels of Adjustable Discrimination

65

65

65

7

5

65

2

7

10

7

Number of Tones / Audio ID

99

99

4

4

4

2

1

3

1

1

4

1

Audio Pitch (proportional to signal strength)

X

X

X

X

X

X

X

X

X

Selectable Notching Capabilities

X

X

X

X

X

X

Ground System

Preset Ground Balance

X

X

X

X

X

X

X

X

X

X

X

Manual Ground Balance

X

X

X

X

X

X

X

X

X

Ground Grab

X

X

X

X

Standard Searchcoil

Accepts Accessory Coils

X

X

X

X

X

X

X

X

X

Power Supply

9V Alkaline Battery

2

2

2

1

2

4

2

2

AA Alkaline Battery 

4

4

8

8

Headphone Jack

1/4"

X

X

X

X

X

X

X

X

X

X

1/8"

X