M165 Sports Mini Bluetooth Headset Wireless Earbud Bluetooth Headset Business Ear Ear Bluetooth

product manual: 1. Support Bluetooth 4.0+EDR protocol 2. Supports A2DP V1.3 AVRCP V1.5 3. Support HFP V1.6, HSP V1.2 4. Support SPP protocol 5. Integrated 48MIPS dual-MAC DSP processor 6. Built-in charging IC 7. Support noise reduction and echo cancellation 8. Support voice prompts, 9. Support UART, I2C Interface 10.6mm*6mm QFN40 package for business Bluetooth headset Chip function support 1. Bluetooth 4.0 stereo Bluetooth headset; 2. Volume adjustment; 3. Up and down song selection; 3. Voice prompts; 4. Calling number broadcast; 5. Point-to-point connection; 6.IOS system power display; 7. Call answer/reject; 8. The last number replay;