Product Overview
The YOCEWECA Voice Amplifier M800GNUHF is a portable sound amplification system designed for clear and powerful voice projection. It features an 18W output, a 4400mAh rechargeable battery, Bluetooth 4.2 connectivity, and an IPX5 waterproof rating, making it suitable for various indoor and outdoor activities.

Image: YOCEWECA Voice Amplifier M800GNUHF with wireless headset mic.
What's in the Box
Your YOCEWECA Voice Amplifier package includes the following items:
- Voice Amplifier Speaker (M800GNUHF)
- Wireless Headset Microphone
- Wall Charger
- 3.5mm Audio Cable (AUX)
- USB Charging Cable (Micro USB)
- Adjustable Waistband/Shoulder Strap
- User Manual

Image: All components included in the YOCEWECA Voice Amplifier package.
Setup
1. Initial Charging
Before first use, fully charge both the voice amplifier speaker and the wireless headset microphone.
- Speaker: Connect the Micro USB charging cable to the speaker's DC 5V input port (located under the rubber flap on the side) and to the wall charger. The LED display will show charging progress.
- Headset: Connect the Mini USB charging cable to the headset's charging port and to the wall charger. A blue LED light on the headset indicates charging.
2. Connecting the Wireless Headset
The wireless headset and speaker utilize UHF wireless transmission technology for automatic connection.
- Power on the voice amplifier speaker by pressing and holding the power button.
- Power on the wireless headset microphone.
- The headset and speaker should automatically pair. A voice prompt will confirm "UHF is connected."
3. Bluetooth Pairing (for music playback)
To play music wirelessly from your device:
- Power on the voice amplifier speaker.
- Press the 'M' (Mode) button on the speaker until you hear the voice prompt "Bluetooth is waiting for connection."
- On your smartphone or Bluetooth-enabled device, search for "SD M800" in the Bluetooth settings.
- Select "SD M800" to pair. A voice prompt will confirm "Bluetooth is connected."
4. Attaching the Strap
Attach the adjustable waistband/shoulder strap to the metal clips on the top corners of the speaker for convenient portability.

Image: Close-up of the voice amplifier showing various input ports and control buttons.
Operating the Voice Amplifier
1. Power On/Off
- Power On: Press and hold the power button on the top of the speaker for a few seconds until you hear a startup tone and the LED display illuminates.
- Power Off: Press and hold the power button again until the device powers down.
2. Mode Selection
Press the 'M' (Mode) button on the top of the speaker to cycle through available modes:
- Bluetooth Mode
- USB Disk Playback
- Micro SD Card Playback
- AUX Input
- UHF Wireless (for headset)
3. Volume Control
- Speaker Volume: Use the '+' and '-' buttons on the top of the speaker to adjust the overall volume.
- Headset Volume: The wireless headset has its own volume controls for independent adjustment.
4. Using the Microphone
Once the wireless headset is connected (UHF mode), speak into the microphone for voice amplification. The headset is designed to be worn over the head, around the neck, or held as a mini handheld microphone.

Image: Wireless headset microphone with detachable ear hook, illustrating various wearing styles.
Media Playback and Recording
1. Music Playback
The voice amplifier supports simultaneous voice amplification and music playback.
- Bluetooth: Pair your device as described in the Setup section.
- USB Disk: Insert a USB flash drive into the USB-A port.
- Micro SD Card: Insert a Micro SD card into the dedicated slot.
- AUX Input: Connect an external audio device using the provided 3.5mm audio cable.

Image: Voice amplifier demonstrating various music playback options.
2. Recording Function
The device supports one-key recording. To use this feature, you must insert a TF/Micro SD card or U disk (not included) and use a plug-in microphone (not the wireless headset).
Care and Maintenance
1. IPX5 Waterproof Rating
The voice amplifier has an IPX5 waterproof rating, meaning it is resistant to splashes and rain. It is suitable for outdoor activities where it might encounter light water exposure. Do not submerge the device in water. Ensure all rubber flaps covering the ports are securely closed when exposed to moisture.

Image: Voice amplifier showcasing its IPX5 waterproof capability.
2. Battery Care
- The built-in 4400mAh lithium battery provides approximately 10-12 hours of speaker working time at half volume. The UHF headset mic has a working time of about 2-4 hours.
- If using for more than 3 hours continuously, consider using a wired microphone or purchasing a wired version of the amplifier.
- Avoid fully discharging the battery frequently to prolong its lifespan.
3. Cleaning
Wipe the device with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
Troubleshooting
- No Sound/Low Volume:
- Ensure both the speaker and headset are powered on and fully charged.
- Check that the headset is properly connected to the speaker (UHF mode).
- Adjust the volume on both the speaker and the headset.
- If using Bluetooth, ensure your device's volume is also turned up.
- Headset Disconnection/Static:
- Ensure the headset and speaker are within the wireless connection range (up to 100ft in open areas).
- Avoid obstructions between the headset and speaker.
- Re-pair the headset if necessary by powering both devices off and on.
- Bluetooth Connectivity Issues:
- Ensure the speaker is in Bluetooth mode.
- Forget the device on your smartphone's Bluetooth settings and try pairing again.
- Ensure no other devices are actively connected to the speaker.
- Recording Not Working:
- Ensure a TF/Micro SD card or U disk is inserted.
- Note that recording typically requires a plug-in microphone, not the wireless headset.
Technical Specifications
- Brand: YOCEWECA
- Model Number: M800GNUHF
- Output Wattage: 18 Watts
- Battery Capacity: 4400mAh Lithium Polymer (included)
- Connectivity Technology: AUX, Bluetooth 4.2, USB, Micro SD
- Waterproof Rating: IPX5
- Material: TPU+Metal
- Item Weight: 1.41 pounds
- Product Dimensions: 7.48 x 5.94 x 2.68 inches
- Frequency Response: 18 KHz
- Wireless Connection Distance: Up to 100ft (open area)

Image: Dimensions of the YOCEWECA Voice Amplifier M800GNUHF.
Official Product Videos
SHIDU M800 Wireless Voice Amplifier Overview
Video: A 35-second overview of the SHIDU M800 Wireless Voice Amplifier, demonstrating its compact design and key features.
Waterproof Wireless Voice Amplifier for Outdoor Activities
Video: A 9-minute demonstration of the voice amplifier's waterproof capabilities and suitability for outdoor use.
Warranty and Customer Support
YOCEWECA provides timely and professional pre-sales answers, in-sales guidance, and after-sales technical support services. Please feel free to contact customer service if you have any questions about the product.
Optional protection plans are available for purchase:
- 2-Year Protection Plan
- 3-Year Protection Plan
- Complete Protect: One plan covers all eligible past and future purchases (monthly billing)