The FiiO Q series consists of high-quality portable digital-to-analog converters (DACs) and headphone amplifiers designed to enhance audio playback from various devices. These products are known for their compact size, making them convenient for on-the-go use, while still delivering impressive sound quality. The Q series supports various audio formats and features multiple connectivity options, including USB and Bluetooth. Models in the Q series, such as the FiiO Q1 and FiiO Q5, cater to different user needs and preferences. They are compatible with smartphones, computers, and other audio sources, providing a significant upgrade to the listening experience. The series is popular among audiophiles and casual listeners alike for its performance and versatility.