Talk on the phone or listen to songs with the BlackBerry 3.5mm Standard Stereo Headset. This headset features an easy to use control button so you can answer or end calls easily at one touch of a button. The headset is lightweight and comfortable to use. The BlackBerry Standard Stereo Headset gives you quality audio and sound isolation, allowing you to enjoy music and make calls easily. Features: 3.5 mm plug (4 poles) Integrated microphone Key for answering/ending calls Shirt clip to keep the cords out of the way Comfortable and ergonomic listening The BlackBerry 3.5mm Standard Stereo Headset.