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1. In-ear silicone earplugs, good sound insulation, three sizes available
2. Active noise reduction, listening to the good
3. Light In-Ear Detection
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Transmission range: 15 meters
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Function: battery display, voice control, call function, support music, multi-point connection
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Bluetooth protocol: 5.0
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Channel: Stereo
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Use method: hanging ear
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Package size: 7x7x3cm