Introduction
The SHIDU H11 is a versatile 40W wireless voice amplifier designed to provide clear and powerful sound projection for various applications. This portable PA system features Bluetooth connectivity, support for USB, TF card, and Aux inputs, and includes both wireless headset and handheld microphones. Its robust design and long-lasting battery make it suitable for teachers, public speakers, tour guides, and karaoke enthusiasts.

Figure 1: SHIDU H11 40W Wireless Voice Amplifier
Package Contents
Please check the package carefully to ensure all items are present:
- SHIDU H11 Voice Amplifier Unit
- Wireless Headset Microphone
- Wireless Handheld Microphone
- Type-C Charging Cable
- Adjustable Carrying Strap
- Audio Cable (3.5mm)
- Antenna

Figure 2: All items included in the SHIDU H11 package.
Product Overview
Main Unit Controls and Ports

Figure 3: Detailed view of the SHIDU H11 controls and ports.
- Power On/Off: Main power switch.
- Mode Button: Switches between Bluetooth, FM, USB, TF Card, and AUX modes.
- Previous/Next Buttons: Navigates tracks in music playback modes.
- Play/Pause Button: Controls music playback.
- REC Function: For recording audio.
- Number Pad: For direct track selection or FM frequency input.
- Music Volume Knob: Adjusts the volume of music playback.
- Echo Knob: Adjusts the echo effect for microphones.
- Instrument Input (INST): 6.35mm jack for connecting instruments like a guitar.
- Instrument Volume Knob (INST VOL): Adjusts the volume of the connected instrument.
- Audio Input (AUX IN): 3.5mm jack for external audio sources.
- Audio Output (AUX OUT): 3.5mm jack for connecting to other audio devices.
- USB Slot: For USB flash drives.
- TF Card Slot: For TF (MicroSD) cards.
- DC 5V Charging Port: Type-C port for charging the unit.
Microphone Details

Figure 4: Wireless Microphones
- Wireless Handheld Microphone: Features an on/off switch, UHF pairing indicator light, and DC 5V charge jack. Provides 8-10 hours of work time.
- Adjustable Wireless Headset Microphone: Includes an indicator light, ON/OFF switch, volume controls (+/-), pairing key, and DC 5V charge port. Offers 3-5 hours of work time. The flexible gooseneck allows for distance adjustment.
Setup
1. Charging the Unit and Microphones
Before first use, fully charge the voice amplifier and both wireless microphones. Use the provided Type-C charging cable. The amplifier has a robust 4400mAh rechargeable battery.

Figure 5: Battery life and charging indication.
2. Attaching the Antenna
Screw the included antenna into the designated port on the top of the amplifier unit for optimal wireless signal reception, especially for FM radio and microphone connectivity.
3. Wearing the Amplifier
Attach the adjustable carrying strap to the amplifier. You can wear it over your shoulder, across your body, or around your waist for hands-free operation.
Operating Instructions
1. Power On/Off
To power on the amplifier, turn the Power On/Off knob (1) clockwise. The display will light up. To power off, turn the knob counter-clockwise until it clicks.
2. Using Wireless Microphones
Turn on your preferred wireless microphone (headset or handheld) using its dedicated ON/OFF switch. The microphone will automatically pair with the amplifier. Adjust the microphone's volume using the volume controls on the headset or the main unit's master volume. Use the Echo knob (8) on the main unit to add or remove echo effects.
3. Bluetooth Pairing
Press the Mode button (2) until "BLUE" appears on the display. On your mobile device, search for "SHIDU H11" in the Bluetooth settings and connect. Once paired, you can play audio from your device through the amplifier. Adjust music volume using the Music Volume knob (7).
4. USB/TF Card/AUX Playback
- USB/TF Card: Insert a USB flash drive into the USB Slot (13) or a TF card into the TF Card Slot (14). The amplifier will automatically switch to the corresponding mode and begin playback. Use the Previous/Next (3, 4) and Play/Pause (4) buttons to control playback.
- AUX Input: Connect an external audio device (e.g., smartphone, MP3 player) to the Audio Input (AUX IN) (11) using the 3.5mm audio cable. Press the Mode button (2) to select AUX mode.
5. Instrument Connectivity
Connect an instrument, such as a guitar, to the Instrument Input (INST) (9) using a 6.35mm cable. Adjust the instrument's volume using the Instrument Volume knob (INST VOL) (10).

Figure 6: Instrument connectivity for music and karaoke.
6. Recording Function (REC)
In USB or TF card mode, press the REC button (5) to start recording. Press it again to stop. Recordings will be saved to the inserted storage device.
Video 1: Official product video demonstrating the features and sound quality of the SHIDU H11 40W Wireless Voice Amplifier, including its design, controls, and usage in various settings.
Specifications
| Feature | Detail |
|---|---|
| Brand | SHIDU |
| Model Number | H11 |
| Output Wattage | 40 Watts |
| Connectivity Technology | Bluetooth, AUX, USB |
| Audio Input | Microphone, Bluetooth, AUX, TF Card, USB Disk |
| Power Source | Battery Powered (4400mAh rechargeable) |
| Item Weight | 1.71 Kilograms |
| Enclosure Material | Acrylonitrile Butadiene Styrene (ABS) |
| Waterproof Rating | IPX5 (splash-proof) |
| Speaker Coverage | Up to 320 people / 22,000 square feet |
Maintenance
To ensure the longevity and optimal performance of your SHIDU H11 voice amplifier, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit and microphones. Avoid using harsh chemicals or abrasive cleaners.
- Storage: Store the amplifier and accessories in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For long-term storage, charge the battery to about 50-70% every three months to prevent deep discharge.
- Water Resistance: The unit has an IPX5 waterproof rating, protecting it from gentle water sprays and splashes. Do not submerge the device in water.
Troubleshooting
If you encounter any issues with your SHIDU H11, please refer to the following common problems and solutions:
- No Sound from Microphone:
- Ensure both the amplifier and microphone are powered on.
- Check if the microphone is properly paired with the amplifier.
- Increase the volume on both the microphone and the amplifier.
- Ensure the microphone is charged.
- Feedback Noise:
- Move the microphone further away from the amplifier.
- Reduce the volume of the microphone or the amplifier.
- Adjust the position of the microphone to avoid pointing directly at the speaker.
- Bluetooth Pairing Issues:
- Ensure the amplifier is in Bluetooth mode ("BLUE" displayed).
- Turn off and on your device's Bluetooth, then try pairing again.
- Ensure no other devices are currently connected to the amplifier via Bluetooth.
- USB/TF Card Not Playing:
- Ensure the amplifier is in the correct mode (USB or TF Card).
- Check if the audio files on the device are in a supported format.
- Ensure the USB drive or TF card is inserted correctly and is not corrupted.
If the issue persists, please contact customer support.
Warranty and Support
The SHIDU H11 Voice Amplifier comes with a 1 Year Manufacturer Warranty. SHIDU is dedicated to delivering superior sound quality and customer satisfaction. If you have any questions, require assistance, or experience any issues with your product, please do not hesitate to contact SHIDU customer support. We are always here to help.