Radius is a Japanese electronics brand specializing in high-resolution earphones, true wireless earbuds, portable audio accessories, and music applications.
Radius Co., Ltd. is a leading Japanese audio electronics manufacturer renowned for its commitment to high-resolution sound. The brand offers a diverse lineup of audio products designed for audiophiles and casual listeners alike, including Hi-Res wired headphones, true wireless earbuds, and portable Bluetooth speakers. Radius focuses heavily on modern connectivity and user comfort, producing advanced USB-C earphones and unique ergonomic designs like their Ear-hug series.
Beyond hardware, Radius develops innovative software solutions such as the Soundmap and Soundmemo applications for audio recording, as well as the NePLAYER app for high-quality music playback. Through a tight integration of precision-engineered acoustics and smart software ecosystems, Radius continually elevates the portable listening and digital recording experience.
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Radius USB-C earphones (such as the HP-Q50C and HP-Q10C) generally support devices equipped with USB Audio Class 1.0 or 2.0 with a USB-C interface. This includes modern smartphones and tablets (Android 5.0/9.0+ or iOS 17.0+), as well as compatible computers running Windows 10+ or macOS 10.12+.
The brand recommends using their NePLAYER playback application, or the free NePLAYER Lite version, which are specifically designed to output high-resolution music files perfectly optimized for your earphones.
Remove the earpieces from the headphones and wash them gently by hand using a mild detergent. Make sure they are completely dry before reattaching them to your device to prevent moisture damage to the audio drivers.
To remove the cable, hold the headphone unit firmly and pull the cable straight out by the plug—do not pull the cable wire itself. To reattach, ensure the 'R' or 'L' marks match, then push the plug in until it clicks securely.