The XAV5421 work right away and fine as long as you do not need to secure. If you want to secure: Can not have the 3 together. 2 2 no problem, whatever the 2 used. 3 no. So if your only goal is to connect a box and internet TV box into another room, I recommend the pack 2. If your goal is to expand the Internet network Secure 3 rooms, avoid this.
