Introduction
The Gesnada K500 Portable Karaoke Machine is a versatile audio system designed for entertainment. It features a 6-inch subwoofer and a 2-inch tweeter, delivering 40W of output power with professional high-low separation and reverb adjustment. This system supports Bluetooth 5.3 connectivity, allowing easy pairing with various devices for music playback and karaoke. It also includes multiple playback options, dynamic RGB lighting, and a long-lasting rechargeable battery, making it suitable for various indoor and outdoor events.

Image: Gesnada K500 Portable Karaoke Machine with accessories. This image displays the main unit, two wireless microphones, a remote control, a charging cable, and an AUX cable.
What's in the Box
Please check the package contents upon unboxing:
- 1 x Gesnada K500 Karaoke Machine
- 2 x Wireless Microphones
- 1 x Charging Cable
- 1 x AUX Cable
- 1 x Remote Control
- 1 x User Manual (this document)
- 1 x Shoulder Strap

Image: Package contents including the karaoke machine, two microphones, remote, and cables.
Product Overview
Familiarize yourself with the main components and controls of your Gesnada K500 Karaoke Machine.
Main Unit

Image: Top control panel of the karaoke machine. This image highlights the multifunctional buttons for volume, mode, recording, and microphone adjustments.
- Power Button: Turns the unit on/off.
- Volume Knob (VOL): Adjusts the main speaker volume.
- Microphone Volume Knob (MIC): Adjusts the microphone volume.
- Echo Knob (ECHO): Adjusts the echo effect for microphones.
- EQ Button: Cycles through equalizer presets.
- Mode Button: Switches between Bluetooth, FM, AUX, USB, and TF card modes.
- REC Button: Initiates recording (requires USB/TF card).
- Light Mode Button: Changes the RGB lighting effects.
- Play/Pause Button: Controls media playback.
- Previous/Next Track Buttons: Navigates through tracks.
- USB Port: For USB drive playback and charging.
- TF Card Slot: For TF card playback.
- AUX Input: For connecting external audio devices via 3.5mm cable.
- Charging Port: DC 5V input for charging the unit.
Wireless Microphones
The two included wireless microphones automatically pair with the main unit. Each microphone features:
- Power Button: Turns the microphone on/off.
- Volume Controls: Adjusts individual microphone volume.
- Display Screen: Shows battery level and frequency.

Image: Rear view of the karaoke machine showing storage slots for the two wireless microphones.
Setup
1. Initial Charging
Before first use, fully charge the karaoke machine. Connect the charging cable to the DC 5V charging port on the unit and to a standard USB power adapter (not included). The LED display will indicate charging status. A full charge typically takes 3-4 hours.
2. Powering On/Off
Press and hold the Power Button on the main unit to turn it on or off. The LED display will illuminate.
3. Microphone Setup
Insert 2 AA batteries into each wireless microphone (batteries included). Press the power button on each microphone to turn it on. The microphones will automatically pair with the main unit. If pairing fails, turn off both the machine and microphones, then restart them.
Operating Instructions
1. Bluetooth Connection
- Turn on the karaoke machine. It will automatically enter Bluetooth mode or you can press the Mode button to select Bluetooth.
- On your smartphone, tablet, or computer, enable Bluetooth and search for available devices.
- Select "Gesnada K500" from the list of devices.
- Once connected, you will hear a confirmation sound, and the LED display will show "BT". You can now play music from your device through the karaoke machine.
2. Other Playback Modes
Press the Mode button to cycle through available input sources:
- USB Mode: Insert a USB flash drive with MP3 files into the USB port. The unit will automatically switch to USB mode and begin playback.
- TF Card Mode: Insert a Micro TF card with MP3 files into the TF card slot. The unit will automatically switch to TF card mode and begin playback.
- AUX Mode: Connect an external audio device (e.g., MP3 player, laptop) to the AUX input using the provided 3.5mm audio cable. Select AUX mode using the Mode button.
- FM Radio Mode: Select FM mode using the Mode button. Use the Previous/Next Track buttons to scan for radio stations.
3. Microphone Usage and Sound Effects
- Microphone Volume: Adjust the MIC knob on the main unit to control the microphone volume.
- Echo Effect: Use the ECHO knob to add or reduce the echo effect for your vocals.
- Voice Changing Effects: The unit supports four voice-changing effects. Refer to the control panel image for specific buttons (e.g., "Magic Voice" or similar labels).
- Recording (REC): While playing music from USB or TF card, press the REC button to start recording your vocals. Press again to stop.
4. Lighting Modes
Press the Light Mode button to cycle through the various dynamic RGB lighting effects. The lights can sync with the music rhythm, creating an engaging visual experience.

Image: The karaoke machine showcasing different colorful lighting patterns, indicating its dynamic atmosphere light feature.
5. TWS (True Wireless Stereo) Function
If you have two Gesnada K500 units, you can pair them for a stereo sound experience:
- Ensure both K500 units are powered on and in Bluetooth mode, but not connected to any device.
- On one unit (this will be the master), press and hold the TWS button (if available, or a combination of mode/play buttons as per specific model instructions).
- The units will attempt to pair. Once connected, you will hear a confirmation sound.
- Connect your Bluetooth device to the master unit. Audio will now play in stereo through both units.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the surface of the unit and microphones. Do not use abrasive cleaners or solvents.
- Storage: Store the unit in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, fully charge the unit before long periods of storage and recharge it every 3 months if not in use.
- Water Exposure: This device is not waterproof. Avoid exposure to water or high humidity.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| No power / Unit does not turn on. |
|
| No sound from speaker. |
|
| Microphones not working / No sound from microphones. |
|
| Bluetooth connection issues. |
|
| Sound distortion. |
|
Specifications
| Feature | Detail |
|---|---|
| Model Number | K500 |
| Output Power | 40 Watts |
| Speaker Configuration | 6-inch Subwoofer + 2-inch Tweeter |
| Bluetooth Version | 5.3 |
| Battery Capacity | 6000mAh (Built-in Lithium Ion) |
| Playtime | 8-10 hours (approx.) |
| Charging Voltage | DC 5V |
| Microphone Batteries | 2 x AA batteries (per microphone) |
| Connectivity Options | Bluetooth, Micro TF Card, USB, AUX, FM |
| Product Dimensions | 12.5 x 5.7 x 13.1 inches (approx.) |
| Item Weight | 8.47 pounds (approx.) |
Warranty and Support
Gesnada products are designed for reliability and performance. For any questions, technical support, or warranty inquiries, please contact Gesnada customer service through the retailer's platform or the official Gesnada website.
Please retain your proof of purchase for warranty claims.