The Motorola RMN4049A Temple Transducer represents a significant achievement in headset design and functionality. It allows the user to receive audio without covering the ear. The receiver portion of this accessory rest on the temples and is capable of converting the receive audio from a two-way radio into sound vibration. The sound vibration is transmitted through the surrounding human tissue and bone directly into the inner ear where it is received by the user. We have been told by our Customers who have hearing impairments they find it to be extremely effective. It features an in-line PTT (push-to-talk) and noise-cancelling boom microphone. The temple transducer enhances communication and safety by not impairing the user's hearing of external sound environment, such as from machinery and equipment, warning, and fire alarms, the intercom, traffic and even casual conversations with the public or co-workers. Designed for the Motorola HT1000, JT1000, MT1500, MT2000, MTS2000, MTX8000, MTX9000, PR1500, XTS1500, XTS2500, XTS3000, XTS3500, and XTS5000