... more than 50 grams of ~150 grams of copper or Lead. Function and Feature:1,Made ... kinds of metallic objection,included iron,stainless steel,copper,zinc,alloy etc.9,Indication of alarming ... Automatically count alarm times and people numbers of passing through on digital panel.11,Password protection function to ... : 220V AC, 50/60Hz2,Power: < 35 W3,Through rate: more than 60 persons / per minute4,Signal ...