TV 2510-NL Wireless amplified digital inductive neckloop receiver compatible with T Coil Hearing aids. Noise-free transmission directly to the hearing aids. Tone and balance adjustment, optimal comfort for long term use Supplied with rechargeable batteries. o Optical input (Toslink), 2.4 GHz Wireless transmission through walls or ceilings. Easy plug-and-play connection, complete wireless solution. With one-touch built-in close proximity Mic on the receiver.