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/