Lab Gruppen CRC-VUL Remote Volume Control Wall Plate (Black)Control the volume levels remotely with the black Lab. Gruppen CRC VUL, a single gang volume remote control wall plate that's designed for the CA, CM, CMA, and CPA series amplifiers. The wall plate features an RJ45 connector and connects to the amplifiers over Cat 5 6 cables (sold separately). The single control knob illuminates, allowing users to easily find it in a dark room. A maximum user volume can be set with the master volume on the amplifier