The SYNCO G3 allows both the receiver (on camera side) and transmitters (on actors'positions) to speak and monitor the sounds in real time. This is the 3-channel recording system. It extends the working distance to 250m at max and meanwhile, enhances the audio stability to create a better interactive audio environment with minimal distractions. This then comes the 2-way communication system between the receiver and each transmitter. Use this wireless microphone recording system in your video making - talk to performers directly without shouting and avoid any recording accidents you don't expect.