This earpiece allows you to discreetly send and receive messages in loud environments. Equipped with one wire for receiving transmissions and a second wire with a combined microphone, programmable button and push-to-talk. This 2-wire surveillance kit is designed with enhanced translucent acoustic tubing and IMPRES audio. Motorola's state-of-the-art IMPRES technology allows communication between the radio and the audio accessory. The result is optimal audio performance, enhanced audio gain capability, and increased customization, assuring the highest quality communication. One wire is dedicated for receiving communication and the second wire has a combined microphone, programmable button and push-to-talk (PTT). This surveillance earpiece allows a radio user to receive messages and ideal when environments require discreet communication. The speaker is wideband ready to provide better audio quality. The translucent tube is replaceable. The earpiece is UL certified.