You probably won’t have heard of Activo, but the CT10 has been developed by Astell & Kern and its parent company iRiver for the hi-res download and streaming service provider Groovers Japan.

There are nods to Astell & Kern’s signature designs here, such as the mint green volume dial in the top-right corner (as seen on the A&norma SR15) but visually, it looks like a smaller, thicker iPhone 3S.
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https://www.whathifi.com/reviews/activo-ct10