15W Voice Amplification
Projects speech clearly for classrooms, presentations and group instruction.
Lightweight voice support for teaching, tours, training and active instruction.
Projects speech clearly for classrooms, presentations and group instruction.
Use the wireless mic as a headset or handheld, with a wired mic included as backup.
Compact 4.5 × 1.3 × 3.5 inch body is easy to wear, carry or pack.
The amplifier is built for long teaching days and extended speaking sessions.
Stream music wirelessly within about 33 ft, or use AUX, TF card and USB.
Record microphone audio when a compatible TF card or USB drive is inserted.

The S278UHF focuses on mobility, clear speech and simple daily operation.
Speak naturally while moving around the classroom instead of raising your voice all day.
Carry a compact speaker while the wireless microphone keeps both hands available.
Use the headset configuration for instruction during yoga, training or group exercise.
A simple solution for workshops, demonstrations, small meetings and public speaking.

Use the S278UHF as a speech amplifier or a compact portable speaker.
Key specifications presented in a scan-friendly format.
| Model | WinBridge S278UHF |
| Product Type | Portable voice amplifier with wireless microphone |
| Peak Output | 15W |
| Microphones | 1 wireless microphone + 1 wired microphone |
| Wireless Mic Use | Headset or handheld |
| Bluetooth | Bluetooth 5.0 · up to about 33 ft |
| Speaker Battery | About 12–15 hours per charge |
| Wireless Mic Battery | About 3–4.5 hours per charge |
| Playback | Bluetooth · AUX · TF card · USB |
| Recording | Supported with compatible TF card or USB drive |
| Audio Formats | MP3 · WAV · WMA · APE · FLAC |
| Frequency Range | 200Hz–18kHz |
| Signal-to-Noise Ratio | ≥70dB |
| Size | 115 × 86 × 35 mm |
| Weight | About 0.44 lb |
Short answers for shoppers, search engines and AI answer systems.
Yes. Its 15W output, wireless microphone and 0.44 lb body make it practical for classrooms, training and daily instruction.
Yes. The package includes one wireless microphone and one wired microphone. The wireless mic can be worn as a headset or used handheld.
The main amplifier is rated for about 12–15 hours per charge. The wireless microphone is rated for about 3–4.5 hours.
Yes. It supports Bluetooth 5.0 for music playback and also accepts AUX, TF card and USB audio.
Yes. Recording is supported when a compatible TF card or USB drive is inserted.
It is well suited to teachers, tour guides, fitness coaches, trainers and presenters who want lightweight wireless voice amplification.
The S278UHF combines a 15W portable speaker, wireless microphone and flexible playback in a compact body.
View WinBridge S278UHFThe WinBridge S278UHF is a portable voice amplifier with a wireless microphone designed for teachers, tour guides, fitness coaches, trainers and presenters. It provides 15W peak output in a compact 0.44 lb body, supports Bluetooth 5.0, AUX, TF card and USB playback, and includes both wireless and wired microphones. The main amplifier is rated for about 12–15 hours per charge, while the wireless microphone is rated for about 3–4.5 hours. Recording support and multi-format audio playback make it useful as both a personal voice amplifier and a compact portable speaker.
Tailored voice amplification solutions for every professional and passion.
Overall rating: 4.94 / 5 from 50 reviews.
The WinBridge S278UHF is a lightweight voice amplifier with a 15W output, suitable for teachers, tour guides, and fitness coaches. It features a compact design, excellent voice clarity, sharp microphone pickup, and supports Bluetooth 5.0, AUX, TF card, and USB playback. The amplifier lasts about 12–15 hours per charge, and the wireless microphone lasts about 3–4.5 hours.
Review topics: [].
"Really good, mum has PSP & this really increased the volume in her voice so we can hear her now :-)"
"Windscreen effectively cuts ambient breeze noise."
"Hooks neatly behind ears. Fits best for medium to large head sizes."
"Even when projecting my voice loudly, the mic handles peak volume levels smoothly without clipping."
"The bendable mic arm holds its exact position, preventing breath pops while ensuring consistent volume."
"Spent eight hours in a corporate workshop using this mic without any discomfort around the ears."
"Matches perfectly with standard 3. 5mm voice amplifier units."
"Doesn't slide down your face while speaking or gesturing naturally."
"It isolates my voice exceptionally well even in fairly noisy exhibition halls."
"Having both hands free while speaking clearly to an audience."
Related Products
!