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Nkomax Wireless Bluetooth Headphones for $ 9.89 @ Amazon with the code: 5R7J38KC. Free Shipping if you have Prime.

【STEREO ACOUSTICAL QUALITY】: CCK KS bluetooth earphone adopts the big diaphragm technology, providing incredible sound quality with deep bass and crystal clear treble
【REFUSE TO FALL】: The sealed in-ear-canal design combining the ergonomic theory ensures KS Parkour can stay comfortably in your ears no matter how tough your workout is
【LONGEST BATTERY LIFE】: CCK KS Bluetooth headset supports 6~8 hours of music/call, 180 hours of standby and with a quick charge of only 2 hours