NUTRON NPB-257 portable teaching amplifier, designed to amplify a person’s voice in classrooms, training rooms, meetings, demonstrations and small indoor gatherings.
It is a compact, wearable public-address (PA) system with a separate microphone and speaker unit.
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Rechargeable portable speaker
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Wired and optional wireless microphone
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USB and TF card music playback
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Bluetooth connectivity
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Digital battery indicator
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High-clarity voice amplification
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Lightweight belt/waist-worn design
| Component | Function |
|---|---|
| Main speaker unit | Amplifies the speaker’s voice |
| Headset microphone | Captures the user’s voice |
| Microphone cable | Connects microphone to amplifier |
| USB connection | Likely charging or USB playback, depending on port |
| Digital display | Shows playback information |
| Front speaker grille | Allows amplified sound output |
| Volume controls | Adjusts output volume |