IR Transmit Main Unit TDB220M 1.High security, prevent external interference 2.Suitable for different conference hall3.Automatic level control function (ALC)4.No disturb under daylight lamp5.Easy to operate and save in project cost6.With the most advanced technology7.Elegant configuration in accordance to ergonomics8.Input channel direct function9.Has 12CH interpreter’s voice for record10.Self-test function, 12 kind of testing voices for systemtest11.PB test and display function12.Installed in a 19-inch frame IR Radiator TDB220S 1.Radiates & distributes up to 12 channels of audio signal2.Auto switched on/off by carrier signals fromtransmissionmain unit3.Auto gain control to ensure diodes with max.efficiency4.Convection cooled for noiseless, reliable operation5.Mounted on ceiling, wall, floor stand or optional tripod6.Easily daisy-chained together to expand coverage7.Half radiator angle: ±22° Interpreter Unit TDB220y Design by the latest technology.12CH simultaneous interpretation.Easy to operate,just with a single press.IR Transmitter unit could connect 11 interpreter’s unitsVoice adjustable and with prevention on feedbackEnsure 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 other channel to listen another interpreter’s voice and then interpret it.Delegates speak too fast;give a request for slow the speed.Automatic numbering on system unitsPrevention on interpreter’s cough10.More people could take part in the conference when system is connected with IR language distribution system. 11.One interpreter’s unit can be used for two unterpreters in turn. IR Receivert TDB220d 1.Pocket size wireless handheld unit 2.Accommodates up to 6 different languages 3.Channel selector and headphone connector 4.Power on/off switch and volume level control 5.Aluminum carrying cases provided for receivers IR Receiver Charger Case TDB220x 1.Used for charging Irreceivers 2.High efficiency switch mode 3.Input Voltage:AC110V~240V/50Hz~60Hz 4.Charges 24pcs of IR receivers per charging 5.Dimension:45.5cmx32cmx34cm