Sigtronics SPO-42N High Noise Environment Four Place Intercom Overview:

Sigtronics Transcom II Portable Intercom

• Fail safe feature allows pilot to always hear radios - even if the intercom is off.
• Operates up to 40 hours on one 9-volt battery (included).
• Includes DC power cable to offer seamless operation on either battery or 11-34 Volt DC aircraft power.
• Radio priority assures that ATC hears only the crew member transmitting.
• Push to Talk Switch inputs for both pilot and copilot.
• AUX audio output: Record ATC communication on your portable device.
• AUX audio input: Plug in your smartphone or table to enjoy music or get alerts from flight planning apps.

The Transcom II is available in 2 place, 4 place, and 6 place versions with the addition of one or two remote expansion modules (accommodating two passengers each), which are connected to the main unit by a 4 foot cord. This allows the backseat passengers to have their own units and connection points, and helps keep cord entanglements to a minimum. 

A music input in all Transcom II intercoms makes long trips more enjoyable for crew and passengers. An audio output records flight dialog for post flight review, a great training tool for any pilot.

High Noise Environment N Series
The Transcom II is available in High Noise Environment version. The SPO N Series intercoms incorporate special high-noise circuitry that works well in ultra-lights, helicopters, open cockpit aircraft, and with hand held radios.

Size:  Two of 4" x 2.9" x 2" 
Weight:  20.4 oz. with battery and power cord