1. Bluetooth V4.0 technology: faster transmission 2. Magnetic design: easy to wear. and make sure to keep it firmly around your neck while exercising 3. Built-in high-performance lithium battery, low power consumption and long working time 4. Super Bass Stereo: Bring you a great music experience 5. Built-in microphone: support hands-free calling 6. In-line control: support volume adjustment, song switching, answering/hanging up calls 7. CVC 6.0 Noise Cancellation: Provides clear conversations and undisturbed music 8. Support voice prompts (Chinese and English) 9. iOS battery indicator: easily grasp the remaining battery 10. Multi-point connection: can connect two devices at the same time