Versatility, functionality and operability have been the key driving factors in the development of the all new Iris - Infrared Interpretation system. The system makes use of the latest DQPSK digital modulation technology and ensures smooth operation – even outside in direct sunlight. With Band IV operation between 2 and 6 MHz interference caused by Plasma TV sets or fluorescent light tubes is not possible. The simultaneous use of up to 16 audio channels meets all requirements – from small individual applications to multinational congresses. Rechargeable Li-Ion batteries in the Iris RP pocket receivers are maintenance- free and a synonym for a reasonable total cost of ownership.