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These headsets are designed to work with your Inter-Tel telephone and are proven to provide excellent sound quality regardles of work environment. Plug'em into your headset port and start enjoying hands-free communication. If you're not sure which headset goes with your Inter-Tel phone just call us and we can provide you with details for the most suitable style for your environment. All commercial-grade corded telephone headsets and telephone amplifiers come with a two-year manufacturer's warranty. All wireless come with a one- year manufacturer's warranty. Wireless headsets and Direct-Connect wired headsets are compatible with the following Inter-Tel telephones: 1032T, 1648, 1664T, 2480, 2480T, 412, 412T, 4500, 550, 616, 824, 8500, 8520, 8560, 8600, 8620, 8622, 8660, 8662, 8690 |