This single-wire surveillance kit comes with an in-line microphone and Push-to-Talk (PTT). The clear tube earpiece is replaceable with quick disconnect and supports the loud audio feature enabled by the device. The speaker is wideband ready to provide better audio quality. 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. The earpiece is UL certified. Ideal for private security, rental, retail and hospitality.