Sennheiser Sennheiser PC 121 Single-Sided In-Ear Headset, 2.5 mm & 3.5 mm Jacks, Black, New

Brand: Sennheiser Communications Model: Sennheiser PC 121 Single-Sided In-Ear Headset Uses: Internet telepathy, Mobile, PC home usage, PC office usage, Music, Entertainment, PC Gaming Features: Microphone mute switch. Choice of left / right side usage. Connectors: 3.5 mm connector for PC. 2.5 mm connector for mobile phone. Form Factor: Ear hook Headphone Frequency Response: 45 - 18,000 Hz Headphone Impedance: 32 Headphone SPL: 113 dB Microphone Type: Boom. Adjustable microphone boom and choice of wearing side Microphone Frequency Response: 80 - 15,000 Hz Microphone Pick-up Pattern: Omnidirectional Microphone Impedance: 2k Microphone Sensitivity: 38 dBV/PA Color: Black and Gray Condition: New in box. As this is new, it has not been tested. Note, I have had this item for a while so the box is a little dinged up. Please reach out with any questions. Thanks for your time!