MC9169E IR Translation unit : 1. The transmitter unit of the IR wireless language distribution system offers high security and prevents external interference. 2. The IR signals will not be disturbed by daylight . 3. It has an automatic level control function. 4. The transmitter unit of the IR wireless language distribution system offers an input channel direct function. 5. It has 6 channel audio output for recording. MC9169F IR Interpreter unit and MC91682 Headphone : 1. It offers 6 channels simultaneous interpretation. 2. The IR transmitter unit can connect 11 interpreter's units. 3. It offers the voice adjustment and prevents feedback. 4. It ensures that every channel is correspondent to the RELAY function respectively.In case the interpreter couldn't understand the speaker's language, he could switch to another channel to listen another interpreter's voice and then interpret it. 5. If delegates speak too fast , it can be give a request for slower speed. 6. It will not pick up interpreter's cough if a special key is pressed down. 7. More pelple can take part in the conference when the system is connected with the IR language distribution system. 8. One interpreter's unit can be used for two interpreters in turn. MC9169G IR Radiator unit : 1. The IR radiator of the wireless languae distribution system radiates and distributes up to 6 channels of audio signal. 2. It offers auto switched ON/OFF by carrier signals from transmitter unit. 3. It has auto gain control to ensure diodes with max efficiency. 4. It is convection cooled for noiseless,reliable operation. 5. It can be mounted on the ceiling ,wall,floor stand or optional tripod. 6. It can be easily daisy-chained together to expand coverage. 7. The half radiator angle is ±22º MC9169H IR Receiving unit : * IR receiver of the wireless language distribution system is a pocket size wireless handheld unit * It accommodates up to 6 different languages. * It has a channel selector and headphone connector. * It offers power on/off switch and volume level control. MC9169I IR Receiver charger case : * It is used for charging IR receivers. * It offers high efficiency switch mode. * The input voltage is AC 110V/240V/50HZ-60HZ * It charges 24pcs of IR recivers per charging. * The dimensions are 45.5*32*34cm.