Motorola PMMN4127 Operational Critical Wireless RSM WM500

The Motorola PMMN4127, also known as the WM500 Operational Critical Wireless Remote Speaker Microphone (RSM), is a premium Bluetooth® wireless speaker microphone designed for professional push-to-talk communications on compatible Motorola radios and broadband devices. It provides users with quick shoulder-mounted access to push-to-talk controls while allowing the connected radio or smartphone to remain securely in a pocket or on a belt.