Two door Doorbell V2

Can two Doorbell v2 be used on front and back door?

Other users have reported doing this, yes. I guess the questions you probably want to answer are:

  1. Do you have wiring for doorbell buttons at both locations?
  2. Do you have a transformer capable of supporting two doorbell cameras?
  3. Does your home’s built-in chime (if you’re using one) support two locations? (Typically such a mechanical chime will have three terminals: FRONT, REAR, and TRANS.)

The Video Doorbell v2 Installation Guide describes situations with more than one doorbell, and the instructions for the alternate wiring method even include a diagram that shows two Chime Controllers (for two doorbells) connected.