From the Manufacturer: BLACKWIRE 3200 SERIES Corded UC Headset The Blackwire 3200 Series corded UC headsets are durable, lightweight, easy to deploy and come in a variety of connectivity and wearing options. Add insights from Plantronics Manager Pro, an additional service, and you've got a future proof solution. The Blackwire 3200 series with Plantronics signature audio provides top notch features at a price you can afford. SUPERIOR AUDIO QUALITY Offering PC wideband, a noise-canceling microphone and hi-fi stereo sound (models C3220/C3225), Blackwire 3200 Series headsets provide a signature truly outstanding audio experience — ideal for voice, music and multimedia. The dynamic EQ feature optimizes your voice quality when you’re on a call and automatically adjusts the EQ settings when you’re listening to music or multimedia. CONNECTIVITY OPTIONS Ideal for knowledge workers who need a solution for managing calls on their PC, mobile phone or tablet. Blackwire 3200 Series offers the comfort and durability of corded combined with flexibility -- at an entry-level price point. You can manage calls from your PC or tablet with standard USB or USB-C connectivity. The C3215/C3225 models offer a 3.5 mm connection option for your wireless device. COMFORT AND PORTABILITY Enjoy the security of a comfortable fit. A lightweight metal headband offers durability and a custom fit. Leatherette ear cushions fold flat for easy portability.