Feature: 1. LCD DISPLAY: This metal detector features an intuitive LCD display screen that shows depth (up to 8in), operating mode, sensitivity level and battery. 2. WITH BACKLIGHT: The underground metal finder has backlight function, convenient to use even in dark places, without worrying about blurring the data. 3. ADJUSTABLE DESIGN: Supports 8 level adjustable sensitivity, 7 different metal indications, you can distinguish 7 target categories and eliminate unwanted metals. 4. SWEEP IDENTIFICATION: Different types of metals are distinguished by ultra slow sweep frequency search coil, and equipped with armrest for easy operation. 5. AUDIO PROMPT: Metal detector has unique bass, mid and treble to distinguish different metals, with 3.5mm audio jack for easy connection of headphones. Specification: Item Type: Metal Detector Product Model: MD3028 Product Material: ABS Working Frequency: 6.6±0.2KHz Power Supply: 2 x 6F22 9V alkaline batteries (battery not included) Headphone Jack: 3.5mm Adjustable Length: Approx. 108-1340mm / 4.3-52.8in Adjustable Sensitivity: Approx. 180mm / 7.1in Adjustable Sensitivity: 8 levels adjustable sensitivity Detection Object: Metal (including iron, aluminum, coins, gold, copper, silver) Adjustable DISC Discrimination Range: 7 different metal indications. (Optional to exclude 7 metals) Detection Method: Identification, fixed point Backlight: Yes Application: Mainly used to detect and identify buried metal objects, widely used in security inspection; exploration of underground pipes and cables; archaeology, prospecting; discovery of buried gold and silver treasures and metal cultural relics. Package List: 1 x Metal Detector Host1 x Armrest1 x Search Coil1 x Connecting Rod1 x User Manual