Semi-In-Ear Bluetooth Earphones Gaming And Sports Wireless Earphone 1. V5.4 chip, stable connection is not easy to disconnect 2. Multi-protocol link HFPA2DPHSPAVRCP 3. Strong compatibility, a variety of systems are applicable 4. HIFI sound quality, the maximum depth of -38db, carefully listening to the beauty of music 5. Lightweight and compact, lightweight and comfortable to wear, no burden 6. Intelligent contact keys, fast connection, practical and convenient 7. Stable signal, game music without delay 8. Type-C charging interface, fast charging without worrying about earphones out of power Parameters: 1. Bluetooth version: 5.4 2. Speaker: 12mm copper ring speaker 3. Standby time: about 600h; working time: 6h; charging time: about 1h 4. Communication distance: barrier-free 10-15 meters 5. Earphone battery capacity: 40mAh 6. Size: 45 x 16.6mm 7. Weight: 5g Note: if you need binaural effect need to buy two Packing list: - Earphone x 1 - Type-C charging cable x 1 - Instruction manual x 1