Model Number: JD-EM2/1608171 Brand Name: JDI Key Specifications/Special Features: Patented soft ear hook can be worn it convenient and not come off easilySpecial material feeling comfortable even long time wearing or perspirationRevolvable ear hook, no limited for right and left ear, also adjustable in any size of earCommunicating privacy, avoiding to bother by anyoneUsing alone or collocate with microphone (example: JD-MIC1 and more)