Universally compatible – Works with all landline phones, modems, fax machines and other devices with standard phone jacks.Ready to use – With a modular jack on each end, this cord fits standard phone jacks and is ready to use right out of the package.Extended reach – 25ft. length extends reach to in-wall phone jacks or between equipment.High-quality cord – Designed to protect against everyday wear and tear, the durable yet flexible jacket comes with 3 white cords and 1 black cord, allowing for use in tight spaces and provides a high-quality upgrade to replace worn or damaged cords.Satisfaction guaranteed – This product is backed by free technical support. Call our team of professionals with any questions or issues about your purchase.