OvisLink Call Center Headset Compatible with Cisco SPA Series IP Phones Corded Cisco Small Business Phone headset. High Quality Call Center Headset with Noise Cancellation Compatible with Cisco Small Business IP phones SPA303, SPA501G, SPA502G, SPA504G, SPA508G, SPA509G, SPA512g, SPA514G, SPA525G2 Comes with Quick Disconnect Cord that connects the headset to the phone directly. No need additional amplifier With lightweight, leatherette ear cushions, flexible microphone boom, adjustable headband and Tangle-Free coiled Cord Comfortable for All-day wearing. 2 Years Manufacture Warranty Included!