HP Poly Blackwire 3310 Monaural USB-C Headset +USB-C/A AdapterPoly Blackwire 3310 Monaural USB C Headset +USB C A Adapter Style, comfort and audio quality Built for style with a sleek design that focuses on comfort and reliability. Poly signature audio quality so you know you will sound great. And intuitive and simple features so every user can connect to their preferred device simply and easily. Performance Country of origin China, Mexico Sound pressure level (max) 118 dB Operating keys Answer end call Colour