Original Lenovo X4 Knochenleitungs-Bluetooth-Kopfhörer, Sport-Ohrhörer, wasserdichtes kabelloses Headset, HiFi-Klangqualität

X4: 1. True bone conduction, no speaker, internal vibration and sound; 2. IP56 grade is waterproof and dustproof, which can prevent sweat from penetrating during exercise; 3. It is made of high-strength titanium alloy, which can be bent at will at 360°, resisting compression and breaking without deformation for a long time; 4. Bluetooth-compatible 5.1 third-generation technology upgrade, more stable transmission; 5. 8 hours of super battery life, about 2 hours of charging time; 6. Charging input: 5V/500mA, battery capacity: 150mAh.