1. Model: BK-TW402. Bluetooth chip: RealtekV5.0 + EDR3. Power input: DC 5V4. Power supply capacity: 3.7V/45mAh5. Charge box battery: 500mAh6. Headphone battery: 50mAh7. Play / music time: 4 hours8. Waterproof: IPX59. Transmission distance 10 meters10. Support Agreement HFP1.7/HSP 1.2/A2DP 1.3,/AVRCP 1.6/SPP 1.2/PBAP 1.011. Frequency range 2400MHZ12. Frequency response 20HZ-20KHZ13.Operation mode: touch14. Color: black, white







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