Features:  Waterproof Search Coil: This metal detector with a 160mm waterproof search coil, so you can use this metal detector to explore under water, perfect for detecting on the beach or in the stream, but the control box can not be put in the water.   Three Audio Tone&High Accuracy: Metal detector has distinctive audio tone-a low tone, a medium tone and a high tone displayed on the interesting icon that can distinguish different metals. DISC mode helps you eliminate target categories and improve your detecting efficiency.  Funny Display Screen with Backlight: The large LCD display screen will show you different detecting depth, overload warning and low battery warning. The backlight of screen allows you to see the screen clearly even in the dark.  Humanity Design: The metal detector is in accordance with ergonomic design, comfortable and convenient to use. Adjustable stem extending from 677mm-925mm adapts to users of different height.  3.5mm headphone Jack: you can insert the suitable stereo earphones (not included) into the earphone jack, headphones allow you to hear the detector alarm in a noisy environment.    Specifications:  Material: ABS+metal  Color: black  Power: 2 * 9V battery (NOT INCLUDED)  Coil size: 160mm waterproof coil  Adjustable length: 677mm-925mm (26.7-36.4in)  Package size: 380 * 222 * 115mm / 15.0 * 8.7 * 4.5in  Package weight: 1132g / 2.5lb    Packing list:  1 * Metal Detector Main Unit  1 * Detection Coil  2 * Connecting Rod  1 * Armrest Rod  1 * User Manual