12 AVM-3901-B, -C, -B4, and -C4 Installation and Operation ManualChapter 2: Installation and RemovalPacking ListEach NEO AVM-3901-B, -C, -B4, and -C4 module package includesthe following items:• One AVM-3901-B, C, B4, or C4-FM front module• One AVM-3901-B, C, B4, or C4-BM back module• One AIB-25-3901MF plug-in adapter (AVM-3901-B andAVM-3901-B4 modules only)• One AVM-3901-B, -C, -B4, and -C4 Multiplexers/SynchronizersInstallation and Operation Manual per orderInstalling AVM-3901-B, -C, -B4, and -C4ModulesThis module requires no specialized installation procedures. For generalinformation about installing NEO modules, see your NEO FR-3901,FR-3903, and FR-3923 Mounting Frames Installation and OperationManual.For information on audio tracking pairs, and installing cooperativemodules together, see “Audio Tracking Pairs” on page 14.Removing AVM-3901-B, -C, -B4, and -C4ModulesThis module requires no specialized removal procedures. For generalinformation about removing NEO modules, see your NEO FR-3901,FR-3903, and FR-3923 Mounting Frames Installation and OperationManual.