REMAX TWS-9 Bluetooth Wireless Stereo Earphone with Charging Box(Black)

1. High-fidelity sound quality, longer battery life, touch operation. 2. 400mAh large-capacity charging compartment, with Bluetooth 5.0 low-power chip. 3. Automatic pairing at boot, master / slave switch, Chinese / English voice switch. 4. It is a headset and a mirror, which is convenient for looking in the mirror and applying makeup. 5. Transmission distance:> = 10 meters. 6. Frequency response: 20-20KHz. 7. Output sensitivity: 99dB+-3dB. 8. Microphone sensitivity: -42+-3dB. 9. Impedance: 16Ohm+-15%. 10. Rated power: 30mW. 11. Battery capacity: Headphone battery 50mAh; Charging case battery 400mAh. 12. Playing time: about 4 hours. 13. Input: 5V/500mA. 14. Output: charging box 5V/1A.