[Bluetooth Compatible with Android and iPhone]CHOSGO V03B Advanced Bluetooth hearing aid technology, connect the hearing aids to the smart phone via bluetooth APP, and operate the hearing aids directly on the APP. It Compatible with Android and iPhone. [Easy Operation]App support settings for different hearing program, and adjust the sound levels, adjust the tone and check the battery power. Also can adjust the sound levels and hearing programs by button.Simple mobile phone touch screen and button operation, easily adjust your ideal hearing aid effect. [High-Quality Hearing]Experience clear conversations with no feedback whistling and original sound quality without distortion. Dual microphones, sound localization technology,improves sound direction perception, enhances hearing naturalness and clarity. High gain can cover people with 80dB hearing loss.Medical-grade hearing solutions prioritize clarity in communication.