FiiO SK-M21C Cassette-Style Protective Case for M21 Color:Blue it completely works which is

it completely works which is what it is made for in the first place

affordability

Compatibilty

M17 PORTABLE DESKTOP-CLASS PLAYER

At home while listening to a podcast or on the go with your favorite song

FiiO SK-M21C Cassette-Style Protective Case for M21 Color:Blue it completely works which isSK M21C Cassette Style Case for M21 Two colors available Retro cassette shape Contact linkage Magnetic opening and closing Inner padding Start your retro musical journey with the M21 A retro cassette style case custom made for the M21, with precisely cut openings and a perfect fit. The case are made of specially selected high toughness and polycarbonate materials, high transparency giving it a pure, attractive look while making it light and portable.