1. Introduction
Thank you for purchasing the Astrum ST020 True Wireless Mini Portable Speaker. This manual provides essential information for the safe and efficient use of your device. Please read it carefully before use and retain it for future reference.
2. Package Contents
- 1 x Astrum ST020 5W TWS True Wireless IPX4 Mini Portable Speaker
- 1 x Charging Cable
- 1 x Lanyard
- 1 x User Manual
3. Product Overview
The Astrum ST020 is a compact and powerful portable speaker designed for on-the-go audio. It features 5W RMS output, TWS interconnection for stereo sound, Bluetooth connectivity, TF card support, and IPX4 water resistance.
Image: Front view of the Astrum ST020 Mini Portable Speaker, showcasing its compact design and speaker grille.
Image: Top view of the Astrum ST020 speaker, highlighting the integrated multi-function control buttons.
Image: The Astrum ST020 speaker shown with its attached lanyard, emphasizing its portability.
4. Setup
4.1. Charging the Speaker
Before first use, fully charge the speaker. Connect the provided charging cable to the speaker's charging port and the other end to a 5V USB power source. The charging indicator light will illuminate during charging and turn off when fully charged. A full charge takes approximately 1.5 hours and provides up to 5 hours of playtime.
4.2. Power On/Off
- To Power On: Press and hold the Power button for 2-3 seconds. You will hear an audible prompt.
- To Power Off: Press and hold the Power button for 2-3 seconds. You will hear an audible prompt.
4.3. Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth pairing mode (indicated by a flashing LED).
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Astrum ST020" from the list of devices.
- Once paired, the speaker will emit an audible confirmation, and the LED indicator will stop flashing.
4.4. True Wireless Stereo (TWS) Interconnection
The TWS feature allows you to pair two Astrum ST020 speakers together for a stereo sound experience.
Image: Two Astrum ST020 speakers shown in the process of True Wireless Stereo (TWS) pairing, connected to a single mobile device.
- Ensure both ST020 speakers are powered off.
- Power on both speakers simultaneously. They will automatically attempt to connect to each other.
- Once successfully interconnected, one speaker will act as the master (left channel) and the other as the slave (right channel). You will hear an audible confirmation.
- Now, connect your device to the master speaker via Bluetooth as described in Section 4.3.
5. Operating Instructions
5.1. Basic Controls
| Button/Function | Action |
|---|---|
| Power Button | Press and hold to Power On/Off. Short press to Play/Pause music. |
| Volume Up (+) | Short press to increase volume. Long press for next track. |
| Volume Down (-) | Short press to decrease volume. Long press for previous track. |
| Mode Button (M) | Short press to switch between Bluetooth and TF Card modes. |
5.2. Hands-free Calling
When connected to a smartphone via Bluetooth, the speaker's built-in microphone allows for hands-free calls.
- Answer Call: Short press the Power button.
- End Call: Short press the Power button during a call.
- Reject Call: Press and hold the Power button for 2 seconds.
5.3. TF Card Playback
Insert a TF (microSD) card with MP3 audio files into the designated slot. The speaker will automatically switch to TF card mode or can be manually switched using the Mode button. Playback controls (play/pause, next/previous track) function as described above.
6. Maintenance
6.1. Cleaning
Wipe the speaker with a soft, dry cloth. Do not use abrasive cleaners, alcohol, or other chemical solvents, as these may damage the surface or internal components.
6.2. Water Resistance (IPX4)
The Astrum ST020 speaker is IPX4 water resistant, meaning it is protected against splashing water from any direction. It is suitable for use in environments where it might encounter light splashes, such as near a pool or in light rain. Do not submerge the speaker in water.
Image: The Astrum ST020 speaker demonstrating its IPX4 splash resistance, with water droplets visible on its surface.
6.3. Storage
Store the speaker in a cool, dry place away from direct sunlight, extreme temperatures, and humidity. If storing for an extended period, charge the battery periodically to maintain its lifespan.
7. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Speaker does not power on. | Ensure the battery is charged. Connect to a power source and try again. |
| Cannot pair via Bluetooth. | Ensure the speaker is in pairing mode. Turn off and on your device's Bluetooth. Move speaker closer to your device. Clear previous Bluetooth connections on your device. |
| No sound or low volume. | Increase volume on both the speaker and your connected device. Ensure the speaker is not muted. Check if the speaker is properly connected. |
| TWS pairing fails. | Ensure both speakers are ST020 models and are powered on simultaneously from an off state. Keep them close during pairing. |
| TF card not playing. | Ensure the TF card is inserted correctly and contains supported audio files (MP3). Try reinserting the card or using a different card. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | A12502-B |
| Speaker Output Power | 5 Watts RMS |
| Connectivity Technology | Bluetooth |
| Audio Output Mode | Stereo (with TWS) |
| Input Voltage | 5 Volts |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 0.26 Kilograms |
| Product Dimensions | 9.4D x 5W x 9.4H centimetres |
| Maximum Bluetooth Range | 10 Meters |
| Special Features | Bass Boost, TWS Interconnection, IPX4 Water Resistant, Built-in Microphone, TF Card Support |
| Battery Playtime | Up to 5 hours |
| Charging Time | Approximately 1.5 hours |
9. Safety Information
- Do not expose the speaker to extreme temperatures, direct sunlight, or open flames.
- Avoid dropping or subjecting the speaker to strong impacts.
- Keep the speaker away from water and liquids, except for its intended IPX4 splash resistance. Do not submerge.
- Do not attempt to disassemble, repair, or modify the speaker yourself. This will void the warranty.
- Use only the provided charging cable or a certified 5V USB charger.
- Dispose of the speaker and its battery responsibly according to local regulations.
10. Warranty and Support
The Astrum ST020 True Wireless Mini Portable Speaker comes with a 1 Year Manufacturer's Warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
For warranty claims, technical support, or further inquiries, please contact your retailer or visit the official Astrum website. Please retain your proof of purchase for warranty service.
