OpenHear BM420 is an open-ear bone conduction hearing aid designed for people with conductive and mixed hearing loss, or sensorineural hearing loss. Building on Shokz's open-ear bone conduction design, it offers greater convenience and long-term comfort. Featuring user-friendly, intuitive controls along with a form factor that is easy to wear, the device is also designed to be age-friendly. Combined with personalized hearing fitting, proprietary bone conduction driver, directional microphones, and environmental noise reduction, it enhances hearing clarity while reducing background noise. Combined with audio streaming, it extends its use to everyday listening, helping users stay socially connected and reduce communication barriers.