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Amazon.com: REL Acoustics Airship™ Wireless Subwoofer Transmitter Created for 212/SX, S/510 and S/812. Compatible with G1 Mark II. Not Compatible Serie T/i, Serie HT, Legacy Serie S or No.25. : Electronics
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Amazon.com: REL Acoustics Arrow™ Wireless Transmitter and Receiver for Models T9i, T7i, and T5i : Electronics
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