Makro 1448-GRACERS Gold Racer Standard Package Metal Detector, Black/Gold Frequency : 56 khz Total weight : 3 lbs (1.4 Kgs) Sensitivity : adjusts the depth of the Device Tone break : adjusts the break points of the target response tones on the target ID range Image : eliminates false signals caused by ground noise or hot rocks when searching in Discrimination modes This is an aftermarket of generic part