This transmitter/receiver pair works very well in setting up 5.1 surround sound speakers without wires. 20ms latency is claimed and I cannot hear any delay. Set up is simple and the boxes found each other in seconds for the radio link. Speaker level inputs for the transmitter are convenient. After about 15 minutes of zero audio input, the set goes into power-saving sleep mode. Excellent product especially with the 50watt amplifier on the receiver and 1/2 off MSRP thanks to Woot! Of course you must provide the rear channel speakers . . .