AIDERY Bluetooth Sounds Amplifier for Ears Rechargable Sounds Amplifier App Control White

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4 sound programs & smart phone app control automatically filter noise in 4 different environment, only amplify the speech volume. switch modes and adjust volumes on the smart phone connect by bluetooth, and when you find a device you like, the device will remember your selection. more sounds source received the amplifier can received sounds frequency below 300hz, and frequency high than 4000hz. more sounds source received, never missing any whistles clear conversations in multiple environments with this amplifier, you can easily enjoy conversationseven in noisy environments such as theaters, churches, meetings, restaurants and similar environments. you won't need to ask people to repeat what they said or pretend you heard them. rechargeable long use time upto 120 hours, 24 hours working time per full charged, and charging case provides 5 charging times per full charged. invisible & comfortable sleek, functional, and practically invisible. so comfortable, you may forget you're wearing them. experience the sound amplifier suitable for mild to moderate sound loss people, and it usually takes 1 week to adjust to the sound obtained through the device. recommedate you take a experience, we offer return and refund.