The EarMen Colibri Battery Powered Pocket USB Headphone Amp is an all-in-one DAC preamp and headphone amplifier. The slimline unit offers 5 hours of battery life and allows for use throughout the day the USB-C charging port is always on hand should you need a quick power boost. Controls on the headphone amp are simple and user friendly featuring a bass boost function for those tracks you want to give a little extra punch. MQA support means the Colibri is equipped to decode hi-res audio files like those found on Tidal so you can enjoy high-quality audio without the bulky equipment. Super low noise circuitry and gold plated PCB design ensures optimum performance without any noise interference from external sources. A balanced 4.4mm and unbalanced 3.5mm output ensures easy integration with your preferred headphones negating the need for any adapters.