JL Audio JLid Communication and Network Bridge for MVi Amplifiers (MVi-HUB) - The MVi-HUB greatly simplifies the configuration of a multi-amp system by allowing all amplifiers of an amplifier network to appear in a single TuN software session. Networking synchronizes the DSP presets of all amplifiers and distributes commands from a single, optional Digital Remote Controller (M-DRC-50 or DRC-205, sold separately) across the entire amplifier network. DRC commands can include Master Volume, Subwoofer Level, Fader, Zone Level and Preset Selection (functionality varies by model). In the Box: Network hub and Two mounting screws; Connections: USB 2.0 ports; Power Input: 5 VDC; Dimensions: 3.98in H x 11.21in W x 2.05in D; Manufacturer 3 year Warranty;