Digital wireless system with up to 10 channels simultaneouslyLink connection allows up to 5 receiver units (ATW-RC13J)The communication frame syncs between the receivers, align the timing of each receiver to ensure stability during multi-channel operations.External mountable receiver unit (ATW-RU13J) is compatible with a wide range of applications.Can be installed anywhere including interior ceilings, walls, or even unfold into another room.Increases the flexibility of the layout for more stable voice communication.