The SpeakerCraft Smartpath Tube-Style IR Receiver (IRC-1.0) is a small IR receiver encased in a threaded tube. These are designed to mount flush to a cabinet or wall surface with only a circular bezel exposed to the room. Among the unique features of the receiver is an exclusive Ambient Noise Suppression (ANS) system. It acts to push down IRI, CFL, EMI, or ESI noise sources so that stronger signals from IR remotes have adequate margin for command of the controlled component. FEATURES: Unique Quad 3.5mm Mini-Phone Type Connector. Exclusive Ambient Noise Suppressor. Small Unit Designed To Mount Flush with a Cabinet or Wall, Leaving Only a Circular Bezel Exposed to the Room. May Be Mounted Behind Grilles of In-Wall Speakers. IR Activity and System Status LEDs. Frequency Range: 28 - 90 kHz. Includes ALR Bezels for Use in Situations with Interference from Plasma Displays or CFL Units. Note: A complete SpeakerCraft Smartpath IR system requires four components: a Terminator Block, an IR Receiver, IR Emitters and a Power Supply.