The Sigtronics Transcom II (SPO-22 2 way) Portable Battery Powered Intercom I1 is a high-quality intercom system designed for easy communication in portable settings. With a 1:2 connection split/duplication, this intercom allows for efficient communication between two parties. Compatible with the SPO-22 model and powered by batteries, this system is convenient and versatile for a variety of uses. Made in Hong Kong by Sigtronics, this unit includes three pieces to ensure complete functionality for your communication needs.