Amazon.com: 18 VDC 500 ma Multi Switch Power Supply Adapter 3x4 3x8 AC Adapter RCA Plug 18 Volt DC with RCA Plug Adapter Transformer 120 VAC 18 DC Multiswitch Component, Use with
Programmable and cascadable multiswitch with 32 User Bands, 4 Universal/Wideband Satellite inputs and 1 terrestrial input (AC/DC power adapter and power inserter included) - Inverto.TV
Amazon.com: Single Wire Multi-Switch with Power Supply for AT9 or AU9 Satellite Dish Antenna 5 Independent Channel for DIRECTV HD Receivers AU9 / AT9 Antenna Stacker Receiver Multiswitch : Electronics