FiiO was established in 2007 and has experience in researching and developing portable music products of different and sell FiiO branded products through sales agents worldwide. The company formed by senior staffs from OPPO. The brand name FiiO is composed of Fi(fidelity from HiFi) and iO(number 1&0). FiiO is ISO9001 standards in quality management. FiiO is a Chinese electronics company known for its audio products, particularly portable audio players, headphone amplifiers, DACs (digital-to-analog converters), and earphones. FiiO products are popular among audiophiles and music enthusiasts for their high-quality sound and relatively affordable prices compared to some high-end audio brands. FiiO's product range includes a variety of portable music players, such as the M series and X series, which are known for their high-resolution audio playback capabilities and support for various audio formats. They also offer a range of headphone amplifiers, such as the Q series, which are designed to improve the sound quality of headphones and earphones, especially when used with mobile devices or computers. Additionally, FiiO produces DACs (digital-to-analog converters), such as the K series, which are designed to improve the audio quality of digital audio sources by converting digital signals into analog audio signals. They also offer a range of earphones and in-ear monitors (IEMs) known for their sound quality and value for money. Overall, FiiO is well regarded in the audio community for producing high quality audio products at affordable prices making them a popular choice for both casual listeners and audiophiles alike.