Ger Detect River-F, Руководство пользователя

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English User Manual
After selecting the Front Range, the digital compass will appear, Fix the
device at a 90-degree angle for the compass to work properly, then Press
the "Skip" button on the screen or the "OK" button on the keyboard.
Increase the length of the antennas receiving a signal
To able the device to detects targets even to 3000 meters