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Jaybird X4 Wireless Bluetooth Headphones in Black Metallic/Flash...
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Jaybird X4 Wireless Sports Earphones 985-000808 Bluetooth Black Metallic Flash 97855143204 | eBay
User manual JayBird X4 (English - 25 pages)
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Logitech Jaybird X4 Wireless Bluetooth Earphone Ipx7 Waterproof In-ear Earbuds Sport Fit Custom Eq Sound Quality Earphon 8hours - Earphones & Headphones - AliExpress