Metal Detectors Professional High Sensitivity 49.2ft Depth 3280.1ft Range Remote Search Metal Scanner Device with LCD Display 100‑240V US Plug Item Type: Metal Detectors Material: Aluminum Weight: Approx. 1410g/49.7oz Size: Approx. 285x195mm / 11.22x7.68in Display Screen Size: Approx. 95x55mm / 3.74x2.17in Search Range: Approx. 1000m/3280.8ft Detection Depth: Approx. 15m/49.2ft Signal Frequency: 400- 470mhz Host Battery (Shipped with Built In Battery): NiMH Rechargeable Battery, AAA, 1000mah Detection Type: Copper, Gold, Silver, Gem. Search System: Microcomputer CPU Control and Reflective Conductivity Working Condition: 1. Fully Charged, Open the Host Detector, The Antennae Is Pulled Open, The Sensing Switch Is Opened, Press the Sensor Needs to Detect the Items Corresponding to the Button, Adjust the Host Detector to Adjust the Depth and Scope of the Search Function for Detection; 2. In the Handheld Stable Without Other Interference, The Detection of the Designated Detection of Items Will Be Swaying Left and Right, Detection of Larger Items When the Amplitude of the Swinging Action Will Increase; Power on Test: Open the Host and the Search Instrument Switch, The Search Instrument on the Work of the Indicator Will Flash; When the Host Selects the Gold Gear, The Search Instrument on the Corresponding Gold Indicator Will Be Bright, In Turn, Select the Host on the Other Silver, Diamonds, Gem Gear, The Search Instrument on the Corresponding Indicator Will Be Bright. If the Host Selects the Gear, And the Corresponding Indicator on the Search Instrument Does Not Light Up, The Host and the Search Instrument May Be Insufficient Power, Need to Charge. If the Above Situation Is Normal, It Means That the Instrument Is Normal and Can Be Used Without Worry.