The GO blu from iFi Audio is a pocket-sized portable amplifier and digital-to-analogue converter. It's the right compact size to take with you wherever you go. It provides premium headphone sound and you don't even need a wired connection to your smartphone as the GO blu is equipped with Bluetooth. Whether you're working out at the gym, going for a jog, travelling or sitting in your favourite café, the GO blu is the perfect companion. It's so dainty that it fits perfectly in your running clothes or jacket pocket, and it's more than pretty enough to put on your table at the café. The GO blu connects wirelessly to your player via Bluetooth, without you having to worry about whether you have the right cable for your Android or Apple device. Just pair ... and you'll be listening to your music in superb Hi-Res quality. Using Qualcomm's quad-core QCC5100 Bluetooth chip ensures that every signal is processed at the highest audio resolution. iFi Audio has even integrated a high-quality microphone into the GO blu, enabling hands-free calls, voice chat for games and access to voice assistants such as Apple Siri and Google Assistant. Additional flexibility is provided by the USB-C port, which serves both to charge the battery and as an audio input, so you can also connect playback devices via cable if the source (e.g. your computer) does not have Bluetooth. A high-quality microphone for hands-free calls, voice chat in games and access to voice assistants is integrated in the GO blu. Whether you use balanced headphones or earphones on the GO blu's 4.4 mm connector or unbalanced headphones or earphones on the 3.5 mm connector, you get the lowest noise and best channel separation for enjoyable music listening.