JBL CSR-2SV Zone ControllerThe JBL CSR 2SV Zone Controller can use analog DC voltage to provide logic control ranging from source selection and volume. Wired with Cat 5 cable with universally accepted RJ 45 connectors up to 1000 feet (305 m) length, the CSR series remote controls allow you to remotely select the source and or control the volume on the CSM mixer. Using CSR 2SV remote control with your CSM 21 or CSM 32 zone mixer, you can remotely control the source on the mixer