Plantronics C325.1 PC & Mobile Phone Headset The Plantronics C325.1 makes for a great PC & 3.5mm mobile phone or tablet headset. The new Plantronics Blackwire C325.1 (SKU # 204446-02) headset is a dual-ear, entry-level priced headset. This headset is unique in that it will plug into your PC through the USB port, and it will plug into your mobile phone using … Continued