1. Is the K1 for use with smartphones?
A: The K1 was designed as a USB DAC for computers, and not guaranteed to work with smartphones. It also does not come with OTG cables for connection with smartphones; users would have to buy these separately. iPhone users need the Camera Connect Kit and not a regular Lightning-USB adapter cable.
The K1 has no battery and draws power from its connected device, which means it would draw power from a connected smartphone.