J-Q16 2 in 1 Digital Display ENC Noise Reduction Wireless Bluetooth Earphone 1. Ergonomically designed for comfortable, fully open fit, preventing fatigue even after extended wear. 2. Two pairs of earphones, allowing for easy switching between clip-on and in-ear styles. 3. Bluetooth 5.4 chip for low latency and strong anti-interference signal. 4. Equipped with a 12mm large diaphragm for superior sound quality. 5. DT5.0 directional sound transmission for lossless, leak-free audio. 6. ENC noise cancellation for clear voice calls. Specifications: 1. Chip: BlueLink AB5756T 2. Bluetooth Version: V5.4 3. Charging Case Capacity: 300 mAh 701530 4. Earphone Capacity: Semi-in-ear: 25mAh 400909, Clip-on: 28mAh 400911 5. Speaker Impedance: 32 ohms 6. Microphone: Surface Mount Microphone, -42dB +-1dB 7. Usage Time: 3-4 hours 8. Charging Time: 1.5 hours 9. Unobstructed Working Distance: 10-15 meters 10. Charging Port: Type-C 11. Input Standard: DC5V-300mA 12. Operating Frequency: 2.402-2.480GHz 13. Frequency Response: 20~20000Hz 14. Features: Touchscreen, low latency, low power consumption earphones, noise-canceling calls, ChineseEnglish language switching 15. Charging case weight: 58.5g 16. Charging case dimensions: 6.9 x 5.0 x 3.2 cm