The PW system requires a wireless network with a high speed internet connection. The PW system uses HD audio protocols and needs a consistent connection to the internet. A strong wireless connection is needed at the locations you plan to have your PW devices located. Most modem/router combos provided by an ISP will not cover even a small area with high signal strength.
If you notice certain areas you would like to place a PW device in have relatively slow WiFi it is recommended that you purchase a separate wireless router to provide better signal strength throughout your home. This will not only enhance the performance of your PW devices, but also your everyday use of wireless devices like laptops, tablets, and phones over your wireless network.