GM-903 Bluetooth Dual Host Digital Hearing Aids LCD Display Elderly Sound Amplifier1. DSP digital chip, suppress whistle, reduce noise, so that the sound quality is better2. LED high-definition digital display, real-time display of the left ear and right ear charging bin power3. Host does not distinguish between left and right, double host independent connection, single machine double machine can be independently connected4. Bluetooth 5.0, compatible with a variety of system types of cell phones5. Magnet adsorption charging, Type-C charging jack6. One-key operation, pauseplayanswer phone, easy to operate7. 35 hours of listening, charging compartment provides an additional 300 hours of battery life8. Charging time: 2 hours