With the volume control knob, you can adjust the output volume of the loud speaker or headphone.
Specifications:
Main material: metal
Color: black
Type: 1-3 (optional)
Type 1: metal detector
Type 2: metal detector+shovel
Type 3: metal detector+shovel+headphone
Operation modes: all metal and DISC
Sensitivity: Max. depth > 180mm for a U.S quarter in all metal mode
Detect objects: metal (iron nail, iron covering, aluminum loop, small aluminum product, coins, gold, bronze, silver)
Operating frequency: 5.69KHz
Power supply: 2 * 9V battery (not included)
Operating current: standby 10mA, Max. 70mA
Detection indication: mechanical pointer mode, audio mode
Sensitivity: adjustable
Volume: adjustable
Adjustable stem: Max. length: 1080mm / 42.5in, Min. length: 780mm / 30.7in
Waterproof search coil diameter: 200mm / 7.9in
Speaker or earphone jack: 1.2"
Application: testing metal foreign body of materials, fuel and food, detection of underground pipeline & line archaeology exploration found buried treasures of gold silver and metal artifacts, the acquisition of scrap metal industry, customs and safety inspection, checking metal foreign bodies in delivery and luggage.
Foldable shovel size: 405 * 98 * 26mm / 15.9 * 3.9 * 1.0in
Package size: 540 * 220 * 110mm / 21.3 * 8.7 * 4.3in