1. Product Overview
The voijump K304 Mini Portable Bluetooth Karaoke Machine is designed for versatile audio entertainment. It features a compact speaker and two wireless microphones, offering high-fidelity sound and various functions for an enhanced singing experience. This device supports Bluetooth 5.3 connectivity and TF/Micro SD card playback, making it suitable for various environments.
Image: The voijump K304 Mini Portable Bluetooth Karaoke Machine, showcasing the speaker and two wireless microphones.
Image: Diagram highlighting the 3D surround sound, DSP technology, 6-8 hours of music playback, and noise reduction capabilities of the speaker.
2. What's in the Box
Verify that all components are present upon unboxing:
- Wireless Microphone *2
- Speaker *1
- Type-C Charging Cable *1
- TF Card *1
- Card Adapter *1
- User Manual *1 (This document)
Image: All items included in the product package: the speaker, two wireless microphones, a Type-C charging cable, a TF card, and the user manual.
3. Setup
3.1 Charging the Device
Before first use, fully charge the speaker and both microphones. Use the provided Type-C charging cable. The charging indicator will show the charging status.
- Speaker Charging Time: Approximately 2 hours for a full charge.
- Microphone Charging Time: Refer to microphone specific indicators.
Image: Visual representation of the device's battery life (8-10 hours playing time) and charging duration (2 hours).
3.2 Powering On/Off
- Speaker: Long press the power button (usually labeled with a power icon or integrated with the Play/Pause button) for 2 seconds to turn on or off.
- Microphones: Long press the power button on each microphone to turn on or off.
3.3 Connecting Microphones to Speaker
The two wireless microphones will automatically connect to the speaker when both are powered on. No manual pairing is typically required for the microphones themselves.
3.4 Connecting to an Audio Source (Bluetooth)
To play music, connect the speaker to your smartphone, tablet, or other Bluetooth-enabled device.
- Ensure the speaker is powered on and in Bluetooth mode (indicated by a blue light or voice prompt). If not, short press the 'M' (Mode) button on the speaker to switch to Bluetooth mode.
- On your audio source device, go to Bluetooth settings and search for available devices.
- Select "K304" or a similar name from the list to pair.
- Once connected, you will hear a confirmation sound from the speaker.
Image: Illustration of Bluetooth 5.3 wireless connection between the karaoke machine and devices like smartphones, tablets, and computers.
3.5 Connecting to an Audio Source (TF/Micro SD Card)
You can also play music directly from a TF/Micro SD card.
- Insert the TF/Micro SD card into the designated slot on the speaker.
- The speaker should automatically switch to TF card mode. If not, short press the 'M' (Mode) button to cycle through modes until TF card mode is active.
Image: Connectivity options for the karaoke machine, including Bluetooth and TF/Micro SD card input.
4. Operating Instructions
4.1 Speaker Controls
Image: Detailed diagram of the speaker's control buttons and their functions.
- Volume Up (+): Short press to increase speaker volume. Long press for the next song.
- Volume Down (-): Short press to decrease speaker volume. Long press for the previous song.
- Play/Pause (►▮): Short press to play or pause music. Long press to power on/off the speaker.
- Mode (M): Short press to switch between modes (Bluetooth, TF Card, AUX). Long press to turn the LED light on/off.
4.2 Microphone Controls
Image: Detailed diagram of the microphone's control buttons and their functions.
- Mic Volume Up (+): Short press to increase microphone volume (5 levels).
- Mic Volume Down (-): Short press to decrease microphone volume (5 levels).
- Echo Level Up (+): Long press for 2 seconds to increase echo level (5 levels).
- Echo Level Down (-): Long press for 2 seconds to decrease echo level (5 levels).
- Power/Play/Pause: Short press to pause/play. Long press to power on/off.
- Voice Change: Short press to switch between 5 magic voice modes.
- Vocal Remove/Restore: Long press the Voice Change button to remove or restore vocals from the playing music.
4.3 Voice Changing Modes
The microphones offer 5 distinct voice changing modes:
- Original Voice
- Female Voice
- Male Voice
- Baby Voice
- Monster Voice
Image: Visual representation of the different voice changing effects available on the microphone.
4.4 LED Light Operation
The speaker features an LED light display that can be controlled independently.
- Long press the 'M' (Mode) button on the speaker to toggle the LED light on or off.
- The lights will beat with the rhythm of the music when active.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the surfaces of the speaker and microphones. Do not use liquid cleaners or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the device frequently. Charge it regularly, even if not in use for extended periods.
- Water Exposure: This device is not waterproof. Avoid exposure to water or high humidity.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery. | Charge the speaker and microphones fully using the provided Type-C cable. |
| No sound from speaker. | Volume too low; Not connected to audio source; Mics not paired. | Increase speaker volume. Ensure Bluetooth is connected or TF card is inserted correctly. Power cycle microphones and speaker to re-establish connection. |
| Microphone not working. | Microphone off; Low battery; Not paired with speaker. | Ensure microphone is powered on. Charge microphone. Power cycle both microphone and speaker. |
| Bluetooth connection unstable. | Device too far from speaker; Interference. | Move the audio source closer to the speaker (within 50 feet unobstructed range). Avoid obstacles or other strong wireless signals. |
| Poor sound quality (scratchy/distorted). | Microphone too close to speaker; High volume/gain settings. | Maintain a reasonable distance between the microphone and speaker. Adjust microphone volume and echo levels. |
Video: An official product video demonstrating the features and operation of the voijump Mini Karaoke Machine. This video provides a visual guide to various functions and connectivity options.
7. Specifications
| Model Number | K304 |
| Brand | voijump |
| Dimensions (L x W x H) | 3.4 x 3.8 x 3.8 inches |
| Item Weight | 1.01 pounds (0.46 Kilograms) |
| Material | Plastic |
| Power Source | Battery Powered |
| Connector Type | USB Type C |
| Connectivity Technology | Bluetooth 5.3, TF Card, AUX |
| Audio Input | Wireless Microphones, Bluetooth |
| Number of Channels | 2 |
| Speaker Count | 1 |
| Battery Life (Playing Time) | Up to 8-10 hours |
| Charging Time | Approximately 2 hours |
8. Warranty and Support
voijump is committed to providing high-quality products and customer satisfaction.
- Warranty: This product comes with a 365-day warranty from the date of purchase.
- Technical Support: Lifetime technical support is available for this product.
- Replacements: Free replacements are offered for eligible issues.
For warranty claims, technical assistance, or replacement requests, please contact voijump customer service through the retailer's platform or the official voijump website.
Image: Overview of customer service commitments including warranty and support.