Product dimensions: 87.5*20*19.5 mm and 105.5*53.5*9.5 mm Case Composition: Zinc Alloy Distance of sensing: 50–70 mm Installation: cargo buried on the surface 22 # wire, 550 mm (with a 380 mm stainless steel protection tube) is the connection. Voltage Power Current: 0.5A/100V/10W Normally open (path alarm) Note: NO Normal open and closed (NO & NC) (this note two, can provide) Package: 100 sets per carton, 1 set per bag