This is used primarily for phones and devices with a 2.5 MM jack. This is sealed in the package.Enjoy hands-free communication with this Belkin ActiFlex Hand-Free Pro Series Microphone Headset in model F8V920-AV3. This headset features ear-pad design that fits comfortably on the ear and a 2.5mm jack for easy connectivity. The sleek black and gray color combination is perfect for any user. Ideal for cell phone accessories, this headset is compatible with various cell phones and is perfect for those who value convenience and clear communication. Whether you are on a call or listening to music, this Belkin headset delivers exceptional sound quality. Get yours today and experience the convenience of hands-free communication!