This metal detector is easy to operate, equipped with protective case, it is convenient to carry. This metal detector is commonly known as a plate type detector, it has a large scanning area to prevent false negatives. With the direct charging and desktop charging options for you to choose, this metal detector is practical. When the voltage is not enough, the indicator light will not light up or keep alarming. There are dual alarm options of acousto-optic and vibration alarm. It can be switched by the automatic reset function switch under the specific demand occasions, so as to realize the elimination of small items. The user can flexibly adjust the detecting sensitivity according to the safety inspection. It is especially suitable for safety inspections in public places or factories that require extremely high detection sensitivity, such as airports, public security, border defense, courts, prisons, stadiums, exhibition venues, entertainment venues, stations and docks; the anti-theft inspection for precious metal manufacturing and processing enterprises such as: jewelry, electronics, hardware, automobile, etc. Made of high-quality ABS and metal, this metal detector is durable. The length of this metal detector is 41.8cm, the width is 8.5cm, the height is 4.5cm. It is suitable for metal detecting in security check, factory guard, education system, etc. Item Name: Metal Detector Material:ABS,Metal Batteries: 6F22ND9V Battery (Not Included) Alarm Mode: Sound/Vibration/Light Synchronous Alarm Size:41.8cmx8.5cmx4.5cm/16.46inx3.35inx1.77in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Metal Detector