DISCRIMINATION WITH PINPOINT FUNCTION - The discrimination mode helps to find target categories and improve your detecting efficiency via turning the knob slowly and clockwise, including iron, nickel, zinc and copper. Additional P/P function helps find the location of the target detected more accurately. VOLUME & SENSITIVITY CONTROLLER - Tacklife metal finder comes with volume controller, the volume is reaching the maximum as controller rotates clockwise; The sensitivity can be adjusted via spinning SENS knot, the sensitivity is the lowest when it spins counter-clockwise to the end. POINTER INDICATOR WITH LED LIGHT - It takes with pointer indicator for telling the indicating situation, when the target is detected, the pointer is deflecting to the right; When the metal is detected, all the indicators are on, offering a great detection environment in the dark; A headphone jack(3.5mm / 1/8inch) could be connected with a headphone (NOT Included), which allows you to use it in the noisy environment. IP68 WATERPROOF SEARCH COIL - 8-inch Diameter waterproof search coil and the adjustable stem (41"-53") enables you to use metal to explore underwater, ideal for detecting on the beach or in the stream.