Use either Bluetooth Headphones at a time for calls and music. You can switch freely between twin mode and mono mode.
Unlike others, is a thoughtful product. If you lose one EARPHONES, just simply purchase the exact one instead of a new pair.
Besides play & pause also supports volume & tracks control for more convenience
Fantastic Immersive Sound with Powerful Bass: Adopted advanced polyurethane drivers to avoid bulky size, M30 provides authentic sound with deep bass even in a small size. Be sure to choose the suitable eartips(S/M/L) to get a better sealing so as to block out noise around and provide fantastic music enjoyment even in the highest volume
Unique Ear-Fin Design for Comfort & Secure-fit: Ergonomic ear-in to disperse pressure and ensure wearing comfort.