The PL-100 amplifier generates a loop signal which can be received by hearing aids with an integrated telephone coil. Setting the hearing aid to »T« or »MT« activates the reception of the telephone signal. The volume of the loop signal can be adjusted steplessly to an amplification of approx. 35 dB by turning the controller. The PL-100, which is lightweight and compact in design, can be worn clipped onto your clothes. The amplifier provides hearing and speech functions with the telephone signal output and integrated microphone and can be used like a headset. Furthermore the PL-100 has an integrated connector which makes it easy to put on the device.