Fangrui Product Details 1. A9 Pro Smart Colorful Touch Screen Anc + Enc Noise Reduction Wireless Bluetooth Earphone 2. Features: 3. Full-color Smart Touch Screen, Easy To Operate 4. Anc Active Noise Reduction + Enc Call Noise Reduction, Clear Calls Without Noise 5. Adopt Bluetooth 5.4 Version, Fast Transmission Speed And Stable Signal 6. 13mm Driver Unit, Hifi-level Sound Quality, Immersive Stereo Surround Sound Effect 7. Ergonomic Design, In-ear Adapt To The Ear Canal, Light And Non-feeling, Comfortable To Wear 8. Parameters: 9. Chip: Jerry 7003d Noise Reduction 10. Bluetooth Version: 5.4 11. Transmission Distance: 15m (barrier-free) 12. Working Frequency: 2.402-2.480ghz 13. Charging Time: 1h 14. Charging Compartment Battery Type: 3.7v Polymer Battery 15. Charging Compartment Battery Capacity: 500mah 16. Headphone Battery Capacity: 30mah 17. Charging Input: Dc 4.75-5.25v 600mah 18. Weight: About 68.5g