Each system needs a minimum of one ir receiver maximum of 6 the small built in ir receiver can be fully integrated in your av cabinet so the entire set can be placed out of sight you can use an extra ir receiver to operate your av equipment from another room works with almost all brands and models and is also suitable for new ir code formats such as rc mm which are used in many new hd devices and digital tv decoders new disruption suppressing technology for use in the vicinity of flat