It is easy to carry and provides clear voice output due to its lightweight design and small size. You can attach it to your belt or trousers, or hang it around your neck or waist using the adjustable shoulder strap.
eBay
SHIDU M800 18W Portable Wireless Voice Amplifier for Teachers UHF Microphone Waterproof Bluetooth Speaker as 4400mAh Power Bank
Aliexpress UK
[Clear no whistling] equipped with IC / CVC dual technology, through the acoustic expert tuning three tone ratio combined with the principle of frequency shift, greatly reducing the whistling frequency.
eBay
Zoweetek Portable Rechargeable Mini Voice Amplifier Speaker with Wired Microphone for Teachers Supports MP3 Format Audio Z258
Aliexpress UK
[Clear no whistling] equipped with IC / CVC dual technology, through the acoustic expert tuning three tone ratio combined with the principle of frequency shift, greatly reducing the whistling frequency.
eBay
Multifunctional Portable Amplifier 8W 2200mAh Voice Amplifier Personal Voice Speaker Microphone Display for Teacher Presentation
Aliexpress UK
【Powerful Voice Amplifier】Stable performance, with microphone headset and waistband, clear sound. 1 Portable Voice Amplifier. We'd like to settle any problem in a friendly manner. Because the unpaid dispute will not be closed automatically, and we may ignore it.
eBay
Megaphone Voice Amplifier Portable Personal Voice Speaker s With Microphone Display Loudspeaker For Teachers Speech Tour Guide
Aliexpress UK
Optimized frequency shifting minimizes unwanted whistling sounds. Portable Voice Amplifier with Microphone Headset – Personal Speaker for Teachers, Guides, and Presenters. Equipped with an80mm composite tweeter speaker fornatural and distortion-free audio.
eBay
Bluetooth UHF Wireless Voice Amplifier Portable For Teaching Lecture Tour Guide Promotion U-Disk Megaphone Microphone Speaker
Aliexpress UK
(【Excellent sound quality】 With a maximum output of 30W, the voice is clear, free of distortion, and has a good magnification effect. 1,000 m2). The louder it covers a large room, the louder the sound.
eBay
Retekess TR619 Megaphone Portable 3W FM Recording Voice Amplifier Teacher Microphone Speaker Mp3 Player FM Radio for Tour Guide
Aliexpress UK
[Clear no whistling] equipped with IC / CVC dual technology, through the acoustic expert tuning three tone ratio combined with the principle of frequency shift, greatly reducing the whistling frequency.
eBay
Voice Amplifier Multifunctional Portable Personal Voice Speaker with Microphone Display Surround Sound for Teachers Speech
Aliexpress UK
The extra clip on the back ensures easy operation. CLEAR SOUND PROJECTION: Experience stable performance and flexible gooseneck design to ensure clear sound as it can be placed directly to your mouth and also supports music playback.
eBay
SHIDU 18W Portable Wireless Bluetooth Speaker Waterproof Voice Amplifier With UHF Microphone For Teacher Support TF M800
Aliexpress UK