Metal Detector Ultra Long Range 3D Professional High Accuracy Metal Detector with Foldable Screen Item Type: Ultra Long Range Metal Detector Material: ABS Battery: Detector: Built In Rechargeable Battery (Nichrome) 2000mAh ( With Built In Battery), Receiver: Build In Rechargeable Battery (Nichrome) 2000mAh ( With Built In Battery) Use: It is not only used in military applications, but also widely used in security checks, archaeological treasure hunting, prospecting. Detecting Object: Gold, Silver, Copper, Conventional Precious Metals (Palladium, Platinum), Gemstones (Diamonds, Emeralds, Rubies, etc.) Basic Parameters: Search Range: Approx. Maximum 1500m/4921.3ft Detection Depth: Approx. Maximum 30m/98.4ft Transmission Frequency: 5.6-6KHz Signal Frequency: 433MHz Operating Instructions: 1. Hold the instrument, and scan very slowly in an arc, together with the rotation of your own. At this time, the explorer's elbow should always be tightly attached to the sides of the body, about 40 degrees to 60 degrees to be able to turn. Attention: Prospector must slowly rotate, and to adhere to the body's stability. 2. Standardize your scanning action. First of all, let the receiving antenna correctly stretch open after. Make the receiving antenna in front of you, and your body into 90 degrees open, not to the left and right sides of the deflection. 3. When the antenna is aligned with the target object, the instrument will be determined, although you continue to explore across the target. When you feel that this determination is valid, you remember the direction. Then, move the instrument about 10 meters to the left or right and repeat the process of determining the approach as described above. Observe the direction of this determination. The intersection of the two directions is the buried position of the object. 4. If you feel that the specific location measured just now is still offset, you can determine from another point of view. If the object is within 10 meters, you should walk slowly and smoothly along one of the routes. When you pass the object and are directly above it, the antenna of the instrument will be shaken on both sides. At this point, the measured position will be very accurate. (Please refer to the instruction manual for specific operation instructions.) The product comes with a demagnetization function (as long as the probe of the receiver is close to the ferrous metal, the alarm three times, can be demagnetized).