144 Languages AI Smart Translation Bluetooth Earphones With Digital Display Charging Case 1. Supported protocols: A2DPAVDTPAVRCPRFCOMM HFPHSP SPPHID 2. Bluetooth version: 5.4 3. Transmission distance: about 10-15 meters without obstacles 4. Battery capacity: 180mAh for charging case, 40mAh for single earphone 5. Charging interface: Type-C 6. Charging time: about 1h 7. Usage time: about 4-60h (used with charging case) 8. Standby time: about 120H+ 9. Charging case size: about 7.2 x 6.46 x 2.6cm 10. Weight: about 50g Features: 1. AI real-time translation, original text and translation results are displayed oppositely, which is convenient for watching the translation content with the other party to avoid inaccurate communication 2. Optional translation mode or text display, face-to-face communication and multiple applicable scenarios 3. Support 144 languages 4. Built-in bass enhancement algorithm, constantly enriching music details, supporting ultra-clear master quality playback 5. Immerse yourself in 9D spatial surround sound 6. Wireless 5.4 chip, stable flash connection and anti-interference 7. Directional sound focusing technology, no sound leakage when listening side by side 8. Adopting angle embedded structure, three-point support, more stable, more in line with the structure of human ears, comfortable fit 9. The charging compartment comes with an LED digital display screen, and the power level can be seen at any time