SHIDU M900UHF Waterproof UHF Wireless Voice Amplifier – 25W for Outdoor
The SHIDU M900UHF is a waterproof UHF wireless voice amplifier with a headset-style wireless microphone, built for outdoor teaching, touring and public speaking. It delivers 25W of output power, is protected to IPX5 water resistance, and runs for 5–7 hours on a 2200mAh rechargeable battery. A UHF wireless microphone lets you move freely across a stage, classroom or outdoor venue while the Bluetooth 5.0, TF card, USB and AUX inputs cover all your audio sources. At just 552g in a black or green ABS+TPU body, the M900UHF is the high-power, weather-ready choice for loud, hands-free voice coverage.
Key Features
IPX5 waterproof design – protected against rain and splashes, ideal for outdoor tours, field teaching and events.
UHF wireless headset microphone – free, hands-free movement with stable wireless voice; no cable to get in the way.
25W high-power output – strong, clear sound that fills large outdoor spaces; frequency response 80Hz–18KHz.
5–7 hours of battery life – a full day of use on a 2200mAh battery, charged via DC 9V 1.2A.
Bluetooth 5.0 – wirelessly play music, audio books or lesson materials from a phone or tablet.
Multiple audio inputs – TF card, USB, AUX and microphone for maximum playback flexibility.
Ultra-lightweight 552g design – easy to carry all day in a durable ABS+TPU casing.
Wide working temperature range (-10℃ to 45℃) – reliable in outdoor and travel use.
Technical Specifications
| Specification | Value |
|---|---|
| Model | SHIDU M900UHF wireless |
| Output Power | 25W |
| Speaker | 3.2-inch magnetic speaker |
| Water Resistance | IPX5 |
| Frequency Response | 80Hz – 18KHz |
| Microphone | UHF wireless headset mic |
| Bluetooth Version | 5.0 |
| Play Time | 5–7 hours |
| Battery Capacity | 2200mAh (7.4V) |
| Charging | DC 9V / 1.2A |
| Audio Inputs | TF card / USB / AUX / MIC |
| Weight | 552g |
| Size | 138.2 × 108.3 × 51.2mm |
| Case Material | ABS + TPU |
| Color | Black / Green |
| Working Temperature | -10℃ ~ 45℃ |






Who Is the M900UHF For?
Outdoor teachers & trainers – deliver field lessons and sports training outdoors without worrying about light rain.
Tour guides – move freely through a group while keeping everyone informed in noisy, open-air venues.
Public speakers & event hosts – the 25W output and wireless mic suit markets, exhibitions and demonstrations.
Fitness & dance instructors – hands-free wireless voice that lets you move with your class.
Wired vs. UHF Wireless Waterproof Amplifier: Which to Choose?
The M900UHF wireless version and the M900 wired version share the same 25W, IPX5 waterproof body — the difference is the microphone. A UHF wireless microphone lets you move freely across a stage or classroom with no cable, ideal for presenters and instructors who walk around. A wired microphone offers rock-solid, zero-latency, interference-free voice for those who prefer a cable. Choose the M900UHF wireless if you move while presenting; choose the M900 wired if you want the simplest, most interference-proof setup.
What's in the Box
1 × SHIDU M900UHF voice amplifier
1 × UHF wireless headset microphone
1 × Charging adapter (DC 9V)
1 × Lanyard /shoulder strap
1 × User manual
Why Choose SHIDU as Your Manufacturer?
SHIDU Acoustic (Shenzhen SHIDU Digital Co., Ltd.) is a professional voice amplifier and PA system manufacturer. We offer factory-direct pricing, OEM/ODM customization, strict quality control and responsive after-sales support, with a dedicated team responding to inquiries within 24 hours. Whether you need one unit for your classroom or bulk supply for distribution, we can meet your requirements.
Frequently Asked Questions (FAQ)
Q: Is the SHIDU M900UHF a wireless or wired voice amplifier?A: The M900UHF is a wireless voice amplifier with a UHF wireless headset microphone, so you can move hands-free while presenting.
Q: Is the M900UHF waterproof?A: Yes, the M900UHF has IPX5 water resistance, protecting it against rain and splashes during outdoor use.
Q: What is the output power of the M900UHF?A: The M900UHF delivers 25W output, with a frequency response of 80Hz–18KHz — enough for large classrooms and outdoor venues.
Q: How long does the M900UHF battery last?A: It provides about 5–7 hours of play time on its 2200mAh (7.4V) battery.
Q: What audio inputs does the M900UHF support?A: It supports TF card, USB, AUX and microphone, plus Bluetooth 5.0 for wireless audio from phones and tablets.
Q: What is the difference between the M900UHF and the M900 wired amplifier?A: They share the same 25W, IPX5 waterproof body. The M900UHF uses a UHF wireless headset microphone for free movement; the M900 wired uses a cable microphone for zero-latency stability.
Q: Can I get custom (OEM/ODM) orders for the M900UHF?A: Yes. As a manufacturer, SHIDU supports OEM/ODM customization. Contact us and we'll respond within 24 hours.











