Exhibit 10(a) EXCHANGE RIGHTS AND RELEASE AGREEMENT Exchange Rights and Release Agreement ("Agreement"), dated as of April 10, 2003, among NCT Group, Inc. ("NCT"), Pro Tech Communications, Inc., an indirect subsidiary of NCT ("Pro Tech"), Alpha...Exchange Rights and Release Agreement • May 14th, 2003 • Pro Tech Communications Inc • Telephone communications (no radiotelephone) • New York
