Keychain Id Reader Card For Video Doorphone Or Access Control

We are offering keychain id reader card for video doorphone or access control:- model no:-ka kc-34 1.a unique key chain id card is used for open a door lock just by touching key chain id card to the external unit of video door phone. 2.we can carry id card in our wallet, so that in case when we came at house late night by using unique key chain id card we can open door very easily without disturbing other family members.