Give users direct control over headphone volume with the Koss VC20, an inline controller built for any 1/8 in stereophone jack. In support desks, training rooms, call environments, and personal audio setups, quick level adjustment matters. The VC20 keeps volume changes close at hand, reducing interruptions and making it easier to tune audio without touching the host device. Its pocket or belt clip helps keep the cord positioned neatly during use, which is a small detail that pays off in comfort and mobility. For organizations that still depend on simple, reliable analog audio accessories, the VC20 is a practical add-on that improves day-to-day usability without adding complexity. Koss backs the VC20 with a lifetime warranty, reinforcing its role as a durable accessory for long-term deployment. When the requirement is straightforward volume control on a standard 1/8 in connection, this controller delivers a focused solution that fits into existing headphone workflows with minimal friction.