Material: zinc alloy, chrome plated, Properties: conductive properties of strong, ensure accurate data transfer. Chromium plated, which can effectively prevent oxidation. LED lights, night reading card more easily (LDE indicator can choose not)
Installation: can be easily installed on doors, exterior design size and information card just coincide, reading card is very sensitive
Envelop dimensions: highly 13MM MM diameter, probe outside, lock gongs outside diameter mm