Airship™ is our newest state of the art zero compression wireless connection for use with the latest Serie S and many more RELs to come. Our goal with this design is to wirelessly deliver a hardwired quality connection.Designed for S/510 and S/812. Compatible with G1 MK II.AirShip can also be used for high or low level and .1/LFE wireless connections for subwoofers from other manufacturers. Only the S/510 and S/812 are designed to have the receiver bolt onto the back amp panel