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Q:What type of batteries and how many are required?
A:We recommend that you use 2× 9V alkaline battery (9V 6LR61) for better results.
Q:Is it waterproof?
A:Yes, it is. The Search Coil is waterproof. But the control box is not waterproof.
Q:Why keeping make a sound?
A:(1)Testing indoors is not recommended.
(2)Reduce the sensitivity and increase the height between the search coil and the ground.
(3)It is not recommended for use in highly mineralized areas.
(4)It is recommended that you check whether the connecting line of the main controller is plugged tightly.
(5)It is recommended that you use 2× 9V alkaline batteries and avoid using 2× 9V carbon batteries.