The Sennheiser EZT 3012 induction loop is an accessory for Sennheiser tourguide radio receivers. The EZT 3012 inductively couples the audio signal from the receiver/conference unit to hearing aids. Using the volume control on the receiver the sound may be easily adjusted to suit an individual user’s hearing. This allows hearing aid wearers to take advantage of an interference-free, optimum sound quality, wireless, listening experience. TECHNICAL SPECIFICATIONS Audio connector 3.5 mm stereo jack plug Cable lengths: induction neck loop 75cm, connection cable 40 cm Impedance 28 Ω at 1 kHz Two-year manufacturer warranty. Sennheiser Item Number 504061