They are made of authentic Chineseium with plastic that you're afraid will dissolve if you bite them. Your interlocutor must make tremendous efforts to hear you because you sound worse than wireless. The sound you hear is of record quality. You hear various crackling ticks from the president's crows inside. Battery is average.

Barely lasted for everyday use for a few months. For its price, it's okay, but for something more reliable, you need a more expensive solution