J28 TWS Wireless Bluetooth Earphones LED Digital Display HIFI Music Sport Earphone 1. Using Bluetooth 5.0 combined with TWS technology can provide faster pairing, stable connection and signal transmission 2. The 14mm large speaker driver can provide truly natural, authentic sound and powerful bass performance 3. CVC8.0 noise reduction, the built-in high-definition microphone supports 1 or 2 earplugs and voice assistant phones, realizing clear hands-free calls 4. Automatic pairing, smart touch design, one-key playpauseanswerhang upadjust volumeswitch songs, etc. No pressure to touch, easy to operate and comfortable to use 5. Wireless earphones can play more than 4 hours of music once charged, and the personalized charging box can also provide 20 hours of battery life for the earphones 6. IPX5 nano waterproof coating can effectively protect sports headphones from sweat or splashes Specifications: 1. Bluetooth version: 5.0+EDR 2. Use frequency band: 2.4GHZ 3. Support protocol: A2DPAVRCPHFP 4. Transmission distance: 10-15 meters, barrier-free 5. Charging voltagecurrenttime: 5V 1A 1 hour 6. Battery capacity: 30mAh built-in left and right ears, battery capacity of charging compartment: 300mAh 7. Music playing time: about 3-4 hours 8. Standby time: 120 hours 9. Charging compartment size: 56x38x38mm 10. Headphone size: 33x17x16mm 11. Packing list: Bluetooth headset X1 Charging cable X1 Manual X1