Check the listing for details. WinBridge M801 Bluetooth Voice Amplifier for Teachers, Wireless Microphone. Color: olive green, Condition: New – Open box. Listed at 48.99 USD. Introducing the WinBridge M801 Bluetooth Voice Amplifier, the perfect tool for teachers and speakers who need to be heard loud and clear. This wireless microphone is designed to enhance your voice and help you reach every corner of the room. With its olive green color and sleek design, the WinBridge M801 is both stylish and functional. Ideal for use in classrooms, presentations, and public speaking engagements, this microphone is easy to use and highly versatile. It is suitable for a wide range of environments and can be used with a variety of devices. Whether you're a teacher looking for a way to be heard over a noisy classroom, or a speaker addressing a large audience, the WinBridge M801 Bluetooth Voice Amplifier is the perfect solution.