Features Use an existing IR remote control to operate hidden AV components Dual Band IR Frequency- supports devices that use a single band or dual band IR frequencies.  Many new cable boxes, DVRs, and other electronic devices require dual-band frequencies.  Some examples are AT&T U-verse DVRs, Dish Network DVRs, and Denon Receivers.  A single-band IR repeater will not work with dual-band devices, but dual-band IR repeaters like this one will work with everything. Frequency: 25-60 KHz Compact IR receiver to discreetly place by your TV*** IR repeater block to repeat the IR signal from the receiver and distribute to the IR emitters attached to the AV devices Two (2) dual output emitters are included to control up to 4 devices Expandable to control up to 10 devices (extra emitters sold separately) Three total IR Receiver ports to expand your control (only one IR Receiver included) Easy Installation ROHS Compliant CE/FCC approved Package included: One IR Receiver (5ft cord) One IR Connecting Block Repeater Two (2) Dual Emitters to control up to four devices (6ft cords) One Power Supply Installation Instruction Sheet