REL Acoustics Arrow Wireless Transmitter and Receiver for Models T9i, T7i, and T5i Arrow Zero Compression Wireless Transmission gives you the ability to place subs in distant corners, along glass walls, or on hardwood floors where a cable would otherwise destroy the aesthetics. The wireless Arrow delivers much of the promise and connectivity of hardwired RELs with the flexibility of placement. Compatible with REL T9i, T7i and T5i subwoofers. Connect the REL Arrow wireless transmitter to your system's amplifier or receiver, plug the receiver module into the back of your REL T/i sub, toggle the switches and you're wirelessly connected ready to enjoy. No assembly required. Comes with manual, power cord. Uses the High Level cable that came with your REL subwoofer WARRANTY: 3 years parts and labor on new products. Covers all REL products and parts that are defective in material and workmanship. We will, at our sole option, repair or replace any defective parts free of charge. The warranty is no transferable.