Wireless foldable retractable stereo hairpin bluetooth csr 40 headset earphone headphone with microphone connecting two devices battery capacity di
Featuresr you must connect your phone with bluetoothr the product with microphone convenient to user stretchable and foldable headbandr csr bluetooth v40 connect with two phones at the same timer built in microphone and speaker support digital signal processing echo cancellation technologyr battery capacity display support for iphone and some android mobile phone custom pairing name and boot vioce promptr deep bass surround sound effect equipped with high fidelity 30mm professional s
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