A systematic and comprehensive tinnitus care solution that combines hardware (headset) and software (app). -The device's open ear features a vibrator behind the ear that is convenient and can be used for listening to music or receiving calls. In particular, to conduct self-hearing and tinnitus tests, perform tinnitus sound therapy while connecting to the CARE4EAR app in daily life. Apart from that it provides daily customized care, constant monitoring, and management service. -Safe to use for healthcare, the mixing-point level maintenance algorithm that automatically adjusts the intensity of care sound anywhere, anytime without the professional guidance. -The serial number that comes with the headset warranty card is the key to connect applications for long-term regular self-test, therapy, and self monitoring. The health care service focuses on treating stress, depression, anxiety, sleep disorder and cognitive impairment. Etereo care is a perfect soluiton for hearing loss prevention and health monitoring system with customized care services.