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Products details:
2G/3G/4G audio door phone
1. No need any wires;.
2. Put sim card to use 2G/3G/4G internet to call mobile phone for intercom and unlock;
3. Support Android and ISO systems.
4. More functions: Passwords unlock/ ID cards unlock/ App unlock;.
5. Support any buildings;
6. Two ways intercom
RFQ:
Q. What internet this outdoor station can use?
A: It compatible with most of SIM card to use 2G/3G/4G card..
Q. How many apartment number this door phone can login?
A: Our product can login 200 apartment numberss, each apartment can use 5 apps.
Q. How many years warranty you provide?
A: We promise 2 years warranty for this model.
http://www.v-doorphone.com/