1.Smart chip, high-definition sound quality, intelligent noise reduction; 2.External microphone to reduce howling feedback; 3.Only weighs 5G, which is lighter than similar products on the market with 7G, and less burden on the ears; 4.60mAh rechargeable battery, charge for 2 hours, use for 30-40 hours; 5.Suitable for people with mild and moderate hearing loss; 6.Hard shell, splash-proof material, longer service life; 7. FCC, ROHS, CE, EMC certification;