The Calrad 40-106 | 8 Amp 6 PORT USB Power Supply: The 40-106 efficient and compact high current universal USB can power all USB consumer electronic devices that have cable terminations to the USB type 'A' standard. This power supply can also be used to provide power for up to 6 x 40-101T or 40-101R QAM units. Specifically designed to be used with our 40-130 1-3/4" x 19" rack kit, that can hold 3 x 40-101T, QAM Transmitters or Receivers .