Headphones Headsets S1 TWS Binaural In-Ear Touch Stereo Wireless Bluetooth Earphone(White) S1 TWS Binaural In-Ear Touch Stereo Wireless Bluetooth Earphone(White) 1. Channel: bilateral stereo 2. Function: battery display, voice control, music support, multi-point connection 3. Impedance: 32 ohms 4. How to use: earplug type 5. Transmission range: 10 meters 6. USB output: 5V 1A 7. Sensitivity: 42db 8. Music time: 3-4 hours 9. Talk time: 3-4 hours 10. Charging time: 1 hour 11. Material: ABS 12. Applicable models: applicable to all mobile phones and smart devices with Bluetooth function 13. Bluetooth version: 5.0 + EDR 14. Protocol mode: A2DP, AVRCP, HSP, HFP 15. Binaural pairing method: automatic pairing after power on 16. Speaker diameter: 8mm 17. Battery capacity: earphone 50mah, charging compartment: 2000mah 18. Battery compartment charging port: micro USB 19. Button function: switch up and down (press twice), increase or decrease the volume (press three times), pause/play 20. Net weight: 98g 21. Gross weight: 130g packing list: Bluetooth headset x 2 Battery compartment x 1 USB cable x 1 Manual x 1 Earplugs x 4