Smart AI Language Translation Earbuds Bluetooth-Compatible 144 Languages Real-time Two-Way Earbuds Bone Conduction Translation Earphones for Travel Business Learning. Features include real-time multilingual translation, multiple translation modes, free online mode, powerful stereo sound, and 30-hour playtime. Specifications include wireless frequency 2.4GHZ, transmission distance 10 meters, battery capacity 40mAh for earphones and 350mAh for charging case, playback/talk time about 6 hours, and waterproof level IPX5.