Fangrui Product Details 1. Description: 2. Hifi Powerful Bass Stereo Sound Effect: 3. 40mm Diaphragm Speaker Drivers, Deep Bass Stereo Sound, Enjoy The Wireless High Quality Music 4. Comfortable Over-ear Fit: 5. Soft Protein Leather Earpad And Retractable Headband Lifts The Burdens For Your Ear. No Discomfort After Long-time Wearing. 6. Comfortable And Foldable: 7. Technical Ergonomics Design With Soft Earmuffs Simulated To Human Skin Texture, Ensure Long Lasting Comfort 8. Wireless And Lightweight: 9. Ear Pad Headphones For Enjoying Extended Listening Of Tv And Audiowithout Disturbing Others 10. Built In Microphone: 11. Supports Hands-free Call And Voice Reporting Incoming Call Number. With The Latest Enhanced Technology Makes You Voice Sound Clearer In Noisy Environments 12. Ever Power Off, Both Wireless & Wired: 13. -the Wireless Mode: A Built-in 400mah Battery Provides Up To 8-10hr Music Time Or Talking Time In A Single Charge; 14. -the Wired Mode: You Can Also Use It As A Wired Headphone With The Provided Audio Cable So The Headphones Will Power Off. 15. Bluetooth 5.0 Adopt: 16. The Bluetooth 5.0 Csr Chipset, Lower Power Consumption, Superior Compatibility. Compatible For All The Mobile Phone, Tablet Pc, Notebook, Any Devices With Bluetooth Function Or Has A 3.5mm Audio Jack 17. Multi-functions: 18. Headsets Have Several Options For Listening Enjoyment. Built In Tf Card Slot And You Can Use A Tf/micro Sd Card With Loaded Mp3 Music And Listen To The Songs Directly On Your Headsets. 19. Colorful Led Light: 20. Seven-color Transform Cool Breathing Light, Shine Everywhere, Anytime. 21. Specifications: 22. Bluetooth Version: V5.0 23. Support Bluetooth Mode: A2dp 1.2, Avrcp 1.0, Hsp, Hsf 1.5 24. Frequency: 2.402-2.480ghz, 2.4g Ism Band 25. Frequency Response: 20 Hz - 20 Khz 26. Signal To Noise Ratio (snr): 70db; 27. Total Harmonic Distortion Rate (thd) 0. 28. Power Indicator: Red And Blue Lights Alternately Flashing 29. Headset Charging: Rechargeable 400mah Lithium Battery 30. Charging Port: Mini 5-pin Usb Charging Interface 31. Normal Charging Time: 2.5 Hours 32. Talk Time: Up To 10 Hours 33. Standby Time: Up To 20 Days 34. Operating Temperature: -20 - 55 35. Package Included: 36. 1* Headphone 37. 1* Charging Cable