SUITABLE FOR MILD & MODERATE SOUND LOSS - suitable for people with air conduction hearing loss of around 30-50 dB. Perfect for listening to music, talking, and watching TV. ONE-BUTTON POWER-ON & MULTIPLE ACCESSORIES - Put the hearing aid in the correct position of the ear before powering on, then press and hold the button for 3 seconds to power on. After power on, short press the button to adjust the volume. You can choose a total of 5 volume levels. Hearing aids come with 3 different sizes of ear tips. Choose the earplugs that suit you. COMFORTABLE NECKBAND DESIGN - The neckband style effectively relieves the burden on your ears and provides a comfortable wearing experience. IPX4 waterproof and ultra-light shell design, suitable for long-term wear, whether in outdoor activities or at home, our hearing aids will be sound tools you can rely on. RECHARGEABLE AMPLIFIER - Hearing aids are rechargeable, which means you don't need to buy and replace batteries. One charge can be used for 80H, no need to charge it frequently. REDUCE BACKGROUND NOISE & NO FEEDBACK WITH 2 HEARING MODES: - Neckband hearing aids use upgraded chips to enhance human voice and reduce background noise. No whistling sound thanks to the special earbud design. Indoor mode: suitable for watching TV, communicating face to face, listening to music, etc. Outdoor Mode: Suitable for hiking, traveling, running, etc.