1. Without the obstacle of cables, set you free to walk, run. 2. Bluetooth V5.0: wireless headphone technology provide faster pairing speed, stable connection, and let you enjoy crystal clear audio, stereo sound. 3. The earbuds work with all smartphones, tablets and bluetooth enabled devices. 4. Charging Case Battery Capacity: 500mAh. 5. Come with portable charging case, built-in lithium ion battery, can provide charge for earbuds anytime. 6. Bluetooth pairing is compatible with both Android and iPhone.