Muse HiFi has released the original M1 Smart device , which combines a portable DAC and headphone amplifier, as well as a battery to charge a smartphone.
When connected to a USB Type-C or Lightning port (depending on the version purchased) of a smartphone, the Muse HiFi M1 Smart lets you listen to music and charge your phone’s battery at the same time. A 3.5 mm jack is provided for connecting headphones . The body of the device is made of zinc alloy and acrylic.
The model supports CTIA and OMTP protocols , which allows the user to receive calls without disconnecting the device from the smartphone. The DAC itself is charged via the USB Type-C port located on the side panel of the case. The model weighs only 30 grams .
The Muse HiFi M1 Smart DAC and Headphone Amplifier combo sells for $39 .