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Amazon.com: Sony Extra Bass Bluetooth Headphones, Best Wireless Sports Earbuds with Mic/ Microphone, IPX4 Splashproof Stereo Comfort Gym Running Workout up to 8.5 hour battery, black : Electronics
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Amazon.com: Sony MDR-XB50BS Black EXTRA BASS Sports Bluetooth In-Ear Headphones MDRXB50BS : Electronics
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Sony MDR-XB50BS review: An affordable wireless sports headphone that fits well and sounds decent - CNET
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