Product details：

Model: A9 pro ANC 5th Generation + Smart screen "ANC+ Double mark ENC+ in-ear detection light sense" Color: White black 1. Chip: Jerry 7003D8 noise reduction + light ear detection 2. Version: 5.4【 Binaural Call 】 3. Working frequency: 2.402-2.480GHz, 4. Supported protocols: A2DP/AVRCP/HFP/HID/AVCTP /AVDTP,and SPP 5. Transmission distance: 15M【 Barrier-free 】 6. Response frequency: 20 ~ 20000Hz 7. Speaker unit: ΦF13 titanium film,32Ω± 15%, 7.118±3DB 5mW 8. Microphone: 2718 silimI-42 ±3dB 9. Charging input standard: contact, DC4.75-5.25V/600MAH 10. Battery type: 3.7V polymer battery 380mAH with protection board (3C fast charging battery), headphone battery 30mah 11. Charging time: 1h 12. Headset working time: Measured 100% volume continuous playback for about 5.5 hours 13: Charging bin chip 7014 chip +A5 chip