Adjustable Zone Sensitivity Metal Detector Scanner with Internal Battery

6 12 16 24 33 Zones Archway Metal Detector For Airport Security Checking Highlight : 1. Internal battery: Can ensure the gate displays normally when power cut and out door ,the battery can last 2-8 hours ( customize) 2. Easy Install :It takes only 20 minutes to install or remove.The installation manuals distributed randomly . 3. Detection zones:Divided into 6 zones to precisely identify multiple targe location form head to toe , avoid the weak/blind zone of detecting areas. 4