Mitel IP Series, Models 5000 IP, 5010, 5020, 5020i, 5040i, 5050, 5055 IP, 5055 SIP, 5140, 5201, 5207 IP, 5210 IP, 5212, 5215, 5220, 5224, 5230, 5235, 5240, 5550 IP DKT-3001, DKT-3010S, DKT-3014SDL, DKT-3020S, DKT-3020SD (MUST HAVE TOSHIBA’S BHEU ADAPTER for on hook answering, sold by Toshiba, not available from this seller) Featuring noise reduction and plug-and-play simplicity, the Practica SP11/12 headsets provide the most cost-sensitive contact centers with good audio performance and an economical design. The headsets are available in a dual-earpiece design that reduces background sound and a single-earpiece design that allows for easy interaction with colleagues. Adjustable components and soft ear cushions ensure comfort during extended wear. Buyer is responsible for paying any gover.