FiiO KA1 is a new portable amplifier with DAC port that offers MQA and DSD256 decoding and power up to 45 mW/32ohm
The FiiO KA1 serves as an adapter or “dongle” for connecting 3.5mm headphones to a mobile device that does not have a jack. It improves sound quality along the way! The FiiO KA1 uses the ESS Technologies ES9281AC PRO DAC chip. This chip is designed for mobile applications and has impressive numbers that you can see in the specifications: You can find other information at this link.