BTR1 is a portable Bluetooth amp and digital-to-analogue converter (DAC) that can receive high-quality music files. The vertical striped design makes the BTR1 appear very small and delicate. Despite having a full-metal body, it feels warm. The multifunctional button is positioned strategically at the front of the device, making it very convenient to operate. It comes in two wearing options – back clip or lanyard – for different environments and conditions.