I love the xd05 basic for its warm sound signature and the bass boost button. It runs my hifiman 400 se and other power hungry iems very well. It was quite annoying to connect different sources to it though. From my sony walkman only the native app works, from android phone the USB dac mode used to work fine but couldn't make ios work.

Long story short, after reading lot of reviews I bought this BT attachment and I am very happy with it ! I can use the native gain and bass boost functions of the amp with the convenience of connecting the source via BT.

I haven't noticed anything significant difference in sound quality on BT and this is amazing.

If you have any of the xduoo series dac/amp this BT attachment is highly recommended.

Low latency with lossless transmission… I bought this to pair with Xduoo Basic Amp and watch movies on my smartTV and Now Iam enjoying it😁
Almost negligible issue of lip sync. Far better than a bluetooth dongle…Rest sound depends on what headphone you are using.

This is a great match for the Xduoo XD05 (Basic/Plus) Dac/Amp ! Gives the convenience of wireles connectivity without much drop in sound quality (if your phone supports LDAC or Aptx-HD). Good fit with the xd-05 and has good battery backup. Overall, quite impressed with it and a definite recommendation if you have the XD05.

This Bluetooth devise sound is amazing< I love it.