Fangrui Product Details 1. H7 Foldable Wireless Bluetooth Headset With Microphone Support Tf Card, Aux 2. H7 Wireless Headphones With Bt V5.0 Technology, Providing High-speed And Stable Transmission. 3. Built-in Powerful Steel Magnetic Speaker, Shocking Heavy Bass, Panoramic Surround Sound, Pleasing To The Ear 4. It Has Multiple Playback Modes, Such As Bt Connection, Tf Card And 3.5mm Audio Cable, So You Can Enjoy Endless Music. 5. Foldable And Adjustable Headband Length, Imitation Protein Leather Ear Cups, Comfortable To Wear For A Long Time. 6. Built-in Microphone For Hands-free Calls, Providing Clear And Realistic Call Sound 7. 400 Mah High-capacity Battery Provides Up To 16 Hours Of Music Playback Time (medium Volume) 8. Parameters. 9. Bt Version: V5.0 10. Operating Range: 10 Meters (no Obstacles) 11. Speaker Unit: 40mm 12. Frequency Response: 20hz-20khz 13. Impedance: 32ω 14. Sensitivity: 103+-3db 15. Battery Capacity: 400 Ma 16. Music Time: About 14-16 Hours 17. Charging Time: About 2-3 Hours 18. Charging Port: Type-c