Keep communication lines open with the Poly CS540 Spare Headset DECT 6.0. Built as a replacement headset for existing CS540 deployments, it helps organizations maintain uptime when a primary unit is lost, damaged, or assigned to a new user. The DECT 6.0 wireless design is well suited to office environments where stable voice performance and desk-side mobility matter. This spare headset is a smart fit for support teams, reception desks, and shared workstations that cannot afford long interruptions. The boom microphone is positioned for clear speech pickup, while the over-the-head form factor supports secure day-to-day wear. Because it is intended to slot into an established Poly environment, it reduces friction for IT and procurement teams managing spares, replacements, and user transitions. For businesses that value continuity, a spare headset is more than an accessory. It is a low-friction way to protect productivity, keep users on calls, and avoid the cost of replacing an entire endpoint when only the headset needs to be swapped.