Stereo - Black - USB Type a, Mini-phone - wired - 20 Hz - 20 kHz - Over-the-head - Binaural - Supra-aural - Noise cancelling microphone Available in monaural (C3210/C3215) or hi-fi stereo with passive noise reduction (C3220/C3225) Variants include universal USB or USB-C Connectivity to smartphone and tablet via 3.5 mm (C3215/C3225). Connects to PC via USB Intuitive inline controls to answer/end calls, control volume, and mute Pc wideband audio with Noise-canceling microphones for high-quality PC telephony Plantronics Manager Pro, an additional purchase, enables your IT team to gain insight into every Compatible Plantronics headset being used company-wide Connectivity Technology: Wired Weight (Approximate): 4.27 oz This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon-qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.