Overview: 1.Bluetooth 3.0 professional chip 2.1200m Bluetooth actual intercom distance, 3 people switch intercom in pairs 3.HD binaural headphones, stereo music 4.Professional waterproof, windproof, high power, support A2DP EDR 5.Answer calls automatically 6.FM radio function 7.650 mAh lithium battery 8.Work more than
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