ATSC 3.0 NextGenTV is here! Receive and watch free to air ATSC 3.0 and ATSC 1.0 TV on a wide range of devices anywhere in your home over your existing Wifi or wired network. All the features of the HDHomeRun CONNECT QUATRO or 4K plus USB for connecting a hard drive (optional). Supports 4K content where available. If ATSC 3.0 is not yet available in your area the HDHomeRun FLEX 4K will use ATSC 1.0. Future proof your TV experience! New: ATSC 3.0 audio on all Windows/Mac/iOS/AppleTV/Android/FireTV devices.