Check the listing for details. BIC America WTR-SYS 4-Channel Wireless Audio Transmitter/Receiver System (Black). Condition: New. Listed at 109.24 USD. BIC America’s 4-channel BIC WTR-SYS wireless transmitter/receiver kit makes it easy to connect your powered subwoofer(s) and powered speaker(s) wirelessly. External antennas assist in offering a range of up to 80 ft. unobstructed and up to 60 ft. obstructed with no interference, delay, or dropouts. Eliminate the need to run expensive long bulky cables and wires! Place your powered subwoofer and powered speakers where they look and sound best with no front-to-back-of-room cables or wires. Connect the W-Transmitter to your A/V receiver, PC, Mac, mobile device, TV, or any product with 3.5 mm or RCA connectors and send a signal to any powered speakers in your home. Note: for powered speaker hookup, your A/V receiver must have variable pre-amp out RCA jacks. Their super-compact size and self-adhesive VELCRO strips enable multiple placement options. With setup in just minutes, you will immediately enjoy CD-quality sound from your patio, second audio zone, or anywhere you’d like! Additional WTR-SYS Kits and W-Receivers can be purchased separately to expand your system.