Teachers, here's a brief description of the amp-up PA-25W voice amplifier that is manufactured by Hamilton-Buhl. The voice amplifier is simple to use and provides crisp voice amplification through a wireless microphone.
To use the voice amplifier, follow these basic steps:
Ensure that you charge both the speaker and the wireless microphone for at least 4 hours
Power on the speaker unit and switch to Bluetooth "BT" by pressing the "M" button
Power on the wireless microphone; the wireless microphone is pre-paired with the speaker through bluetooth
Adjust the volume on both the speaker and wireless microphone; reduce the echo on the speaker
Please see here for more detailed instructions.