The following telephone headset products are designed for use by individuals who need amplification or clarity using a headset. Many of these products are designed for use with t-coil equipped hearing aids while others can be enabled via Bluetooth. Some of these products are to be used with cellular phones and audio devices (e.g. MP3 players), while others can be used with cellular, corded, cordless, single-line, and multi-line phones. Products that offer tone control are also listed. Go to the web sites provided or contact the resources listed for technical assistance regarding these products.