S1 is amazing, but sadly my Lotoo OTG lightening cable has quality issues and is coming apart and losing connection after very light use over just 3 weeks since it arrived from MusicTeck. Have requested a replacement and will update on progress.
Excellent DAP. Easy to use and outstanding sound. Purchase was easy.
I have made several purchases from Musicteck and all have been excellent. This nifty DAC is great because it has a low profile connection to my IPad or IPhone without a camera adaptor.
Really good sound in both IRM or headphones, including a balanced plug.