Transcrypt International, a subsidiary of EFJ, Inc. offers a scrambler designed to provide voice security for Kenwood Model TK-2180, TK-3180 and other similar Kenwood portables and TK-X180 series mobile radios. Transcrypt's KW21-4XX scrambler offers secure voice communications to help protect sensitive audio transmissions from unwanted listeners, such as the media, adversaries, terrorists and insurgents. The product can be manufactured to offer one of four varying levels of security, dependent on the needs of the end user and the level of privacy desired. This scrambler is easy to install, having been designed using a custom form factor for these specific Kenwood radio models. It offers ideal voice recognition while the radio is operating in the secure mode and allows for seamless operation with the radio.