1. Introduction
Thank you for purchasing the Singing Machine Duets Party Mics SMM478. This product consists of two portable Bluetooth microphones with integrated speakers, designed for wireless audio playback and vocal performance. This manual provides essential information for safe and effective use, including setup, operation, maintenance, and troubleshooting.
Key Features:
- Pair two units simultaneously for duet performances.
- Portable Bluetooth speaker functionality integrated with the microphone.
- Lighting effects that synchronize with your singing.
- Adjustable microphone volume and echo controls.
- Rechargeable Li-ion battery providing over 4 hours of operation.
2. Important Safety Information
Please read all safety and operating instructions carefully before using this product. Keep these instructions for future reference.
- Water and Moisture: Do not use this product near water (e.g., bathtub, sink, swimming pool).
- Heat: Do not place the product near heat sources such as radiators, heat registers, stoves, or other heat-producing appliances.
- Ventilation: Ensure proper ventilation. Do not block any ventilation openings.
- Power Sources: Use only the power supply specified by the manufacturer.
- Cleaning: Clean only with a dry cloth.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Battery: Do not expose batteries to excessive heat such as sunshine, fire, or the like.
3. Package Contents
Verify that all items listed below are included in your package:
- Two (2) Singing Machine Duets Party Mics (SMM478)
- Two (2) USB Charging Cables
- Instruction Manual (this document)
4. Product Overview
Familiarize yourself with the components and controls of your Singing Machine Duets Party Mics.

Figure 4.1: Front view of two SMM478 microphones, highlighting the control buttons and the light-up speaker bases.

Figure 4.2: Angled view of two SMM478 microphones, illustrating the microphone grille at the top and the control layout.

Figure 4.3: Detailed view of the speaker base of the SMM478 microphone, featuring the protective grille and integrated lighting.
Control Panel (Refer to Figure 4.1):
- POWER Button: Press and hold to turn the microphone ON or OFF. Press briefly to change lighting modes.
- VOLUME Controls (+/-): Adjust the microphone's vocal volume.
- ECHO Controls (+/-): Adjust the echo effect applied to your voice.
- DUETS Button: Used for pairing two microphones together for duet mode.
- Bluetooth Button: Press to enter Bluetooth pairing mode.
- Charging Port: Micro-USB port for charging the internal battery.
5. Setup
5.1. Charging the Microphones
- Connect the small end of the USB charging cable to the Charging Port on the microphone.
- Connect the large end of the USB charging cable to a powered USB port (e.g., computer, USB wall adapter).
- The charging indicator light will illuminate during charging and turn off when fully charged.
- Allow approximately 2-3 hours for a full charge.
Note: Fully charge the microphones before first use for optimal battery life.
5.2. Powering On/Off
- To Power On: Press and hold the POWER button for approximately 3 seconds. You will hear an audible prompt.
- To Power Off: Press and hold the POWER button for approximately 3 seconds. You will hear an audible prompt.
5.3. Bluetooth Pairing (Single Microphone)
- Ensure the microphone is powered on. It will automatically enter Bluetooth pairing mode, indicated by a flashing Bluetooth light.
- On your Bluetooth-enabled device (smartphone, tablet), go to the Bluetooth settings and enable Bluetooth.
- Search for available devices and select "SMM478" from the list.
- Once paired, the Bluetooth light on the microphone will stop flashing and remain solid. You will hear a confirmation tone.
Note: If prompted for a password, enter "0000".
5.4. Duet Pairing (Two Microphones)
This feature allows two SMM478 microphones to connect to a single Bluetooth device for duet performances.
- Power on both SMM478 microphones.
- On the first microphone, press the DUETS button. It will enter pairing mode, indicated by a flashing light.
- On the second microphone, press the DUETS button. The two microphones will attempt to pair with each other.
- Once the two microphones are paired, the DUETS light on both will become solid. You will hear a confirmation tone.
- Now, connect your Bluetooth-enabled device to the first microphone (the one you pressed DUETS on initially) as described in Section 5.3. The device will recognize both microphones as a single audio output.
Note: Ensure both microphones are within close proximity (e.g., 1 meter) during duet pairing.
6. Operating Instructions
6.1. Playing Music
After successfully pairing your microphone(s) with a Bluetooth device, you can play music through the integrated speaker(s). Control music playback (play/pause, skip tracks) directly from your connected device.
6.2. Adjusting Microphone Volume
Use the VOLUME + and VOLUME - buttons on the microphone to increase or decrease the volume of your voice.
6.3. Applying Echo Effect
Use the ECHO + and ECHO - buttons on the microphone to adjust the intensity of the echo effect applied to your voice.
6.4. Changing Lighting Effects
Briefly press the POWER button to cycle through different lighting modes on the microphone's base. The lights are designed to sync with your singing.
7. Maintenance
7.1. Cleaning
- Always power off the microphone before cleaning.
- Use a soft, dry cloth to wipe the exterior surfaces.
- Do not use liquid cleaners, aerosols, or solvents.
7.2. Storage
- Store the microphones in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for an extended period, charge the battery every 3-6 months to maintain battery health.
7.3. Battery Care
- The product contains a built-in rechargeable Li-ion battery. Do not attempt to replace it yourself.
- Dispose of batteries according to local regulations.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Microphone does not power on. | Battery is depleted. | Charge the microphone using the provided USB cable. |
| Cannot pair with Bluetooth device. | Bluetooth is not enabled on your device, or microphone is not in pairing mode. | Ensure Bluetooth is enabled on your device. Press the Bluetooth button on the microphone to enter pairing mode. Ensure no other devices are connected. |
| No sound from microphone speaker. | Volume is too low, or microphone is not connected. | Increase microphone volume using the VOLUME + button. Ensure the microphone is successfully paired with your device. |
| Duet pairing fails. | Microphones are too far apart, or incorrect pairing sequence. | Ensure both microphones are close to each other. Follow the duet pairing steps in Section 5.4 carefully. |
9. Specifications
| Model Number | SMM478 |
| Product Dimensions | 3.5 x 3.5 x 10 inches (each microphone) |
| Item Weight | 1.46 pounds (each microphone) |
| Connectivity | Bluetooth |
| Battery Type | Rechargeable Li-ion |
| Battery Life | Over 4 hours (approximate) |
| Included Components | 2 Microphones with integrated speakers, 2 USB charging cables |
10. Warranty and Support
Singing Machine products are manufactured with quality in mind. For specific warranty information, please refer to the warranty card included with your purchase or visit the official Singing Machine website. For technical support or customer service inquiries, please contact Singing Machine customer support through their official channels.
Website: www.singingmachine.com





