XP MI-4 Waterproof PinPointer Metal DetectorXP MI 4 Waterproof PinPointer Metal Detector The MI 4 is a traditional pin pointer, designed to be used by all detectorists at an attractive price, the MI 4 has the same specifications as the MI 6, without the DEUS ORX radio connection. When operating, you can re calibrate the pinpointer by briefly pressing the button while away from any metallic source. On mineralized ground and salt water, it is advised to re calibrate while in contact with the