Metal detection distance (cm): 3 to 5 Size to be detected: φ2cm or more Non-contact AC detection voltage (V): 30 to 1000 Display: Non-contact AC detection (LED on), metal detection (LED on) DC voltage (V): - AC voltage (V): 30 to 1000 Power supply (v):A23(12V)电池X 1(单 出售) 宽度(mm):23 深度(mm):23 高度(mm):146 电源:A23(12V)电池x 1(分别出售)