The T-Link hands-free headset offers a simple and economic alternative of connecting hearing systems to cellular and cordless DECT phones or other communication devices. The hearing system must have a t-coil (Ì´ÌÛTÌ´ÌÛ switch) for an inductive sound transmission. With a strong induction coil for a good performance. T-Link is equipped with a 2.5 mm jack plug. Adapter may be required. Various adapters for cell phones are available. Please mention the exact type and name of the cell phone in your order for adapters.