The PM3000 brings new heights to performance. Excellent quality at a great price! It boasts an easy-to-use interface that clearly outperforms the competition. The PM3000 Stereo Panel Mounted, Four/Six-Place Intercom is our latest generation design, featuring many of the most advanced features in intercom technology. Some of its best features include: Three modes at a flip of the switch: Pilot isolate (ISO), crew isolate (front seats separate from back - 6-Place only), and all, so that the entire aircraft may communicate together. Dual stereo entertainment inputs - Allow incredible flexibility, even giving pilots the option to feed music to the passengers and allow them to chat among themselves without disturbing the front seats. A single squelch control knob - For multiple squelch circuits provides simplified operation as well as making the intercom one of the quietest to use, even in the noisiest of aeroplanes. Automatic fail-safe interconnect to the aircraft radio wires the pilot's headset to the aircraft radio in the event of disrupted power or related failure. Separate pilot and co-pilot transmit capabilities ensures that only the person pressing the PTT will be heard over the radio. The intercom volume does not effect the aircraft radio volume, and the pilot has the ability to control the audio level of the intercom independently from the audio level of the aircraft radio. ThePM3000 is one of our best selling intercoms and with good reason. This unit is just one more example of why PS Engineering is the market leader in the field of aircraft audio.