Due to much confusion from readers of this add, ill try to simplify. Up for sale is the earily model D Premier... Ser# 00351. This Unit Can not be updated to later firmware and/or ANY OTHER configuration via the SD card. It has stayed and will remain in its original Factory Configuration with firmware 5.6.0 (CONFIGURED BY FACTORY) This amp will ONLY have use of OPTICAL 1, OPTICAL 2, AES/EBU, DIGITAL 1, DIGITAL 2, LINE 1, PHONO. AND FIRMWARE 5.6.0. The REMOTE CONTROL will control SUB BASS FILTER +/-, BALANCE </>, BASS +/-, TREBLE +/-, INVERTED PHASE +/-. No Wifi, No HDMI!. You cannot change firmware or configurations via the sd card. This also means no Mono Block possibilities. It CANNOT be a Master or Companion. Any Sd card placed in this unit to upgrade post firmware's after 5.6.0 updates or configures other than its factory original is not possible. The outside of the black shipping box is all scratched up. Maybe by a komodo Dragon or a small Snow Leopard. Paypal fee is $89.00, shipping w/insur is $111.00. all these prices are firm. 48 states only. Thank you for reading, Bob 504 382 2397 BOTTOM LINE, YOU GOT THE BEST USED INTEGRATED AMP/DAC COMBO POSSIBLE THAN ANY OTHER BRAND OUT THERE UNDER $6000. Read the zillion great published reviews.