Mitel Headset Phone models: SuperSet 4000 Series models 4015, 4025, 4125, 4150 (rev G or newer); IP Phone: models 5010, 5020, 5040, 5055, 5140, 5201, 5205, 5207, 5210, 5212, 5215, 5220, 5224, 5230, 5235, 5240, 5250, 5312, 5324, 5330, 5340, 5550