Audio-Technica"s 2000 and 3000 Series wireless systems are convenient, reliable and affordable. And with the AT-8630 rack accessory you can rackmount TWO 3000 or 2000 series receivers, such as the ATW-R310 in a compact 1U space! The AT-8630 includes a joining plate that connects two 2000 or 3000 Series receivers. Having two receivers in a single 19" rack space makes wireless mic management a breeze!