Introduction
This manual provides detailed instructions for the safe and efficient operation of your SUPNIU S50 Portable Bluetooth Speaker. Please read this manual thoroughly before using the product and retain it for future reference. The SUPNIU S50 is a powerful 30W portable Bluetooth speaker featuring HiFi sound, TWS pairing, RGB lighting, and support for TF cards and AUX input, designed for versatile audio experiences.
What's in the Box
- 1 x SUPNIU S50 Bluetooth Speaker
- 2 x Wireless Microphones
- 1 x USB Charging Cable
- 1 x AUX Cable
- 1 x Quick Start Guide

Product Overview
Speaker Features
The SUPNIU S50 features a 4-inch driver for balanced audio, dynamic RGB lights, and multiple connectivity options.

Control Panel
The top panel of the speaker provides easy access to all controls.

Wireless Microphones
Two high-quality wireless microphones are included for karaoke functionality.

Setup
Charging the Speaker
- Connect the provided USB charging cable to the speaker's charging port (DC-5V).
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer USB port.
- The charging indicator light will illuminate during charging and turn off when fully charged. A full charge typically takes 3-4 hours.
Charging the Microphones
The wireless microphones can be charged using the provided Type-C cables.
- Connect the Type-C cable to the microphone's charging port.
- Connect the other end to a USB power source.
- Charging time for microphones is typically 1-2 hours.
Powering On/Off
Press and hold the Power button on the speaker's control panel for a few seconds to turn the unit on or off.
Operating Instructions
Bluetooth Pairing
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing LED.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "SUPNIU S50" from the list. Once connected, the speaker will emit an audible confirmation, and the LED will stop flashing.
True Wireless Stereo (TWS) Pairing
To achieve a wider stereo sound, you can pair two SUPNIU S50 speakers together.
- Ensure both S50 speakers are powered on and not connected to any other Bluetooth device.
- On one speaker (this will be the primary speaker), press the TWS button. The speaker will enter TWS pairing mode.
- The primary speaker will automatically search for and connect to the second S50 speaker. Once connected, both speakers will play audio in stereo.
- Now, connect your device to the primary speaker via Bluetooth as described above.

Playing Audio via AUX, TF Card, or USB
- AUX Input: Connect one end of the 3.5mm AUX cable to your audio device and the other end to the speaker's AUX port. The speaker will automatically switch to AUX mode.
- TF Card: Insert a TF (microSD) card with audio files into the TF card slot. The speaker will automatically detect and play music from the card.
- USB Drive: Insert a USB flash drive with audio files into the USB port. The speaker will automatically detect and play music from the drive.
- Use the 'Mode' button to switch between different input sources (Bluetooth, AUX, TF, USB).
Using the Wireless Microphones
- Turn on the microphone(s) by pressing the power button on the microphone. They will automatically connect to the speaker.
- Adjust microphone volume using the dedicated controls on the microphone or the speaker.
- Some microphones may offer echo or other vocal effects; refer to the microphone's specific instructions for these features.
LED Light Modes
The speaker features dynamic LED lights that can be customized.

Press the 'LED Mode' button on the speaker to cycle through different light patterns or to turn the lights off.
Maintenance
- Clean the speaker and microphones with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Keep the device away from water, moisture, and extreme temperatures.
- Store the speaker in a cool, dry place when not in use.
- Avoid dropping or subjecting the device to strong impacts.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on | Low battery; Power button not pressed correctly | Charge the speaker; Press and hold the power button for 3-5 seconds. |
| No sound | Volume too low; Incorrect input mode; Device not paired | Increase volume; Select correct input mode (Bluetooth, AUX, etc.); Re-pair Bluetooth device. |
| Bluetooth pairing fails | Speaker too far from device; Bluetooth not enabled on device; Speaker already paired to another device | Move speaker closer to device; Enable Bluetooth on your device; Disconnect from other devices and try again. |
| Microphone not working | Microphone off; Low microphone battery; Microphone not paired | Turn on microphone; Charge microphone; Re-pair microphone with speaker. |
Specifications
- Brand: SUPNIU
- Model Number: IT-S502
- Speaker Output Power: 30 Watts
- Speaker Size: 4 Inches
- Wireless Communication Technology: Bluetooth 5.0
- Connectivity Technology: AUX, Bluetooth, TF, USB
- Power Source: Battery/DC
- Product Dimensions: 20.6P x 8.2l x 28.1H cm
- Material: Acrylonitrile Butadiene Styrene (ABS)
- Special Features: Portable, LED Light, With Microphone, Stereo Pairing (TWS)
- Recommended Uses: Travel, Daily Use, Home Parties, Outdoor Picnics, Hiking, Camping, Cycling, Workout, Yoga
Warranty and Support
This product comes with a limited warranty. For detailed warranty information and support, please refer to the contact information provided in your Quick Start Guide or visit the official SUPNIU website.





