PRT668 is designed for simultaneous translation in radio and TV. It features:

• One ultra low noise microphone preamplifier with input level control and three line level balanced outputs. Option: 48V phantom supply.
• In simultaneous translation, the same people translate the two languages, language 1 to language 2 for the foreign guest and language 2 to language 1 for broadcasting.
• PRT668 features 2 lighted switches with memory to switch the two language outputs. Actuating one of the switches, enable the require audio, and disable talkback.
• Two GPO loops one for each channel, allow remote control.
• A fugitive talback key, allows the translator to send order to the control room, using a third output. When pressed this key cuts the other outputs, return to normal on release.
• A GPI allows to send an external control to mute at the same time the two languages output (1 and 2).
• An ON AIR indicator, enabled by the PRT668, or from the control room.
• One balanced stereo program input to feed the embedded headphone amplifier.
• The headphone amplifier features a volume control and a balance between the external program (return from control room) and the signal from the microphone. Some translators prefer to hear themselves, others no.
• A talkback system, with program fade. Fade is activated by order signal or external loop or both.
• Talkback can be sent to both earphones, or either left or right.