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♫【Bone Conduction】The transmission of sound waves to the inner ear, directly through the skull to induce corresponding waves in the exolymph, and to stimulate the cochlea's spiral apparatus to produce hearing
♫【OPEN EAR BONE CONDUCTION CONCEPT DESIGN 】IHAO bone conduction concept design and Open-Ear Wearing design delivers music sound through air. Open-Ear design helps you stay alert to your surroundings, prevent danger meanwhile enjoy music. Painless even long time wearing. 
♫【No Pain For All Day】The Open-ear design of BD&M bone conduction earphones help you achieve the true painless and harmless. You don't need to put the earphones in the ear canal. So your ears will not feel sore and painful even if you listen to music for whole day. Prevent your ear canal from being hurt by wearing headphones for a long time. Realize true freedom. It is a good choice for music lovers. 
♫【Advanced Bluetooth 5.1 Version】The latest bluetooth 5.1 chip bings stronger and faster connection. And it is truly wireless to make yourself free from cable mess. Supporting a variety of Bluetooth-compatible devices, including smart watch, tablet, iOS or Android devices... BD&M bone conduction earphones are designed to be hung behind the ears and have a simple and stylish looks. Let you become a fashionista in one second. 
♫【Healthy and Clean】 Open ear design air conduction headphones can avoid wearing discomfort caused by in-ear or over-ear headphones, and keep the inside of the ear canal clean and hygienic, you can also wear them with glasses for audiobooks, watching TV, movies etc. without disturbing others
product description：

• Bluetooth version: V5.2+EDR

• Support protocol: A2DP1.3HFP1.6HSP1.2AVRCP1.6D11.3

• Usage mode:Bluetoothcard mode（Maximum Support 32g）

• Transmission distance: 10-15m

• Battery capacity: 180mAh

• Charging voltagecurrent: 5V1A

• Playcall time: about 8-10h

• Charging time: about 2h

• Standby time: 180 days

• Speaker impedance: φ16mm 32Ω

• Microphone sensitivity: -42Db

• Working temperature: -10-50℃

• Bluetooth version: V5.1+EDR

• Support protocol: A2DP1.3HFP1.6HSP1.2AVRCP1.6D11.3

• Usage mode:Bluetoothcard mode（Maximum Support 32g）

♥ Dear customers:
Hello! Our shop (Billigo-COD) mainly deals in electronic products, fashion accessories, home life, beauty care and other products, which have been shipped to overseas warehouse by sea, aiming to create a healthy life palace with reasonable price, fast and convenient, reliable quality for African friends.
Although we are far east, we are always attentive to the needs of our friends in Africa.
Therefore, we hope to get more real product reviews from you, whether good or bad, which enables us to eliminate bad products in time and upgrade more high quality products to meet your needs. Please be assured that your comments are under careful review.
You can also email us at aoshaliyun@163.com or leave your suggestions in the comments section.
We are trying to create high quality and reasonable price products, hoping to gain more friends' trust. Thank you to everyone who has followed and believed in us.
Bless you.