The KW2 receiver facilitates wireless audio transmission from the XIO Soundbar to connected subwoofers, providing flexible placement without cable constraints. It plugs directly into the rear of compatible KEF active subwoofers, including models KC62, KC92, KF92, and Kube, ensuring robust four-pin connector transmission. Compatibility extends to third-party subwoofers via an Aux/Optical Combo output, making it versatile for various setups. The receiver comes complete with a USB-C power cable, optical cable, 3.5mm aux to RCA cable, screw sets, and a quick start guide. Note that KW2 is not compatible with KEF LS Wireless Collection speakers, for which the KW1 Adapter Kit is recommended. Secure and seamless connectivity is guaranteed, enhancing sound performance without the clutter of cables. Elevate your audio system with this reliable wireless subwoofer receiver. Specific warranty terms and details for KEF products can be found here.