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产品名称：sport bluetooth earphones b15
features:
1. bluetooth v5.0
2. neck loop design provides high stability wearing and noise cancelling
3. multi-function remote control with microphone
1. bluetooth v5.0
2. neck loop design provides high stability wearing and noise cancelling
3. multi-function remote control with microphone
specifications:
bluetooth version: v5.0
working range: 10 meters
chipset: bk3266
frequency: 20hz~20khz
battery: 80mah
music/talk time: 6 hours
charging time: 2 hours
driver unit: 10mm
impedance: 16ω