The bluetooth master control chip. Can talk, listening to music Built-in DSP audio processing system, can be a very good eliminate Noise and echo, to ensure clear communication, and music. Small and light, stealth design. Battery type:50mA rechargeable lithium battery,Mini Style Wireless Bluetooth Headphone Black S530 In-Ear V4.0 Stealth Earphone Phone Headset Handsfree Compatible with All Android & iOS Devices
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