Higoo(TM) Infrared Remote Extender 2 Receivers 6 Emitters Hidden IR Repeater System Kit DC Control remote control devices that are hidden behind doors or in other rooms! Kit controls up to 4 devices - Expandable to 12 devices (Additional IR emitters sold separately) May ALSO be powered by USB cord as well (USB power cord NOT included) Kit includes: 1-Distribution block; 2-IR Receiver; 1-Standard power plug; 3-Dual IR Emitters for 6 devices; 1-Manual 1 Year Warranty against manufacturing defects*. PLEASE NOTE, DOES NOT WORK WITH: Cisco RNG150 & RNG250 & Marantz devices