Loudspeaker Mini Portable For Teachers Classroom Wired Wireless Voice Amplifier

Loudspeaker Mini Portable For Teachers Classroom Wired Wireless Voice Amplifier. Features: High Definition, Low Transparency, Low Distortion, and the Ability to Restore Music and Vocals As an Instrumental Thing. Mono Loudness Can Up to 128dB and Easily Covers 500 Square Meters of Space. And Mini Size is Convenient to Take.  The Digital Power Amplifier K400 Selects Intelligent Digital Power Amplifiers with High Efficiency, and Consumes Only One Third of the Analog Power Amplifiers of the Same Power Level. The Frequency Shift Anti-howling Frequency Shifter is a Device That Can Change the Sound Frequency. The Working Principle is Similar to a Tone Changer, Which Can Increase the Frequency of the Sound Signal by 5Hz Destroying the Condition of Generating Acoustic Feedback, Thereby Suppressing the Acoustic Feedback to the Utmost Extent. Perfect for Tour Guides, Teachers, Lecturers, Entertainers, Cheerleaders, Sales Promoters, Etc. Specifications: Material: ABS Plastic Color: Black, Red Types: Wired, Wireless Size: About 85x85x34mm (LxWxH) Rated Power: 5W Input Power: Power Adapter/USB Power/battery Battery: Built-in 3.7V Battery Degree of Separation: 80dB Distortion: 1% (3.7V, 1KHz, 1W) SNR: 83dB Working Voltage: DC 3.7V Impedance: 2 Speaker: 2.5 "x1 Audio Format: MP3/WAV Package Included: 1pc X Voice Amplifier 1pc X User Manual 1pc X Data Cable 1pc X Belt 1pc X Wired Headset Microphone.