1. Introduction
Thank you for choosing the Astrum ANC True Wireless Bluetooth Earbuds. This manual provides detailed instructions on how to set up, operate, and maintain your earbuds to ensure optimal performance and longevity. Please read this manual carefully before using the product.
2. Package Contents
- Astrum ANC True Wireless Bluetooth Earbuds (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual
- Multiple sizes of ear tips (S, M, L)
3. Product Overview
Familiarize yourself with the components of your Astrum earbuds and charging case.

Figure 3.1: Earbuds placed inside the open charging case, showing the charging contacts and LED indicators.

Figure 3.2: Close-up view of the individual left and right earbuds, highlighting their ergonomic design and touch control areas.
4. Charging Your Earbuds and Case
The charging case has an internal battery that can charge the earbuds multiple times. Ensure both the earbuds and the case are fully charged before first use.
4.1 Charging the Earbuds
- Place the earbuds into their respective slots in the charging case. Ensure the charging contacts align.
- The LED indicators on the earbuds will light up to show they are charging. They will turn off or change color when fully charged.
4.2 Charging the Charging Case
- Connect the USB charging cable to the charging port on the case.
- Connect the other end of the cable to a USB power adapter (not included) or a computer's USB port.
- The indicator lights on the charging case will show the charging status.
A full charge provides approximately 7 hours of playtime for the earbuds, with the charging case extending total playtime to 35 hours.

Figure 4.1: Visual representation of the extended battery life, indicating 35 hours total playtime with the charging case and 7 hours playtime per single charge.
5. Setup and Pairing
Follow these steps to pair your earbuds with your device.
5.1 Initial Pairing
- Ensure the earbuds are charged and placed in the charging case.
- Open the charging case. The earbuds will automatically enter pairing mode, and their indicator lights will flash.
- On your device (smartphone, tablet, computer), enable Bluetooth.
- Search for new Bluetooth devices. Select "Astrum ET360" from the list of available devices.
- Once connected, the earbud indicator lights will stop flashing. You will hear a confirmation tone.
The earbuds utilize Bluetooth 5.3 for a stable and instant connection.

Figure 5.1: Depiction of seamless Bluetooth 5.3 connectivity, ensuring a stable and instant connection for the earbuds.
5.2 Reconnecting
The earbuds will automatically reconnect to the last paired device when taken out of the charging case and Bluetooth is enabled on the device.
6. Operating Your Earbuds
The Astrum ET360 earbuds feature touch controls for various functions.
6.1 Music Playback
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Volume Up: Triple tap on the right earbud.
- Volume Down: Triple tap on the left earbud.
6.2 Call Management
- Answer/End Call: Single tap on either earbud.
- Reject Call: Press and hold either earbud for 2 seconds.
6.3 Active Noise Cancellation (ANC)
The earbuds feature Active Noise Cancellation (ANC) for an immersive audio experience and clear calls via HD dual mics.
- Toggle ANC/Transparency Mode: Press and hold the touch area on the left earbud for 2 seconds.

Figure 6.1: Illustration demonstrating the effect of Hybrid Noise Cancellation (ANC) on the earbuds, showing noise reduction before and after activation.
6.4 Voice Assistant (Siri)
- Activate Voice Assistant: Press and hold the touch area on the right earbud for 2 seconds.
6.5 Sound Quality
The earbuds are equipped with 13mm dynamic drivers for excellent sound quality, providing immersive sound and deep bass.

Figure 6.2: Visual highlighting the 13mm dynamic drivers within the earbuds, emphasizing their contribution to excellent sound quality and deep bass.
7. Maintenance and Care
Proper care will extend the life of your earbuds.
- Clean the earbuds and charging case regularly with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners or solvents.
- Keep the charging contacts clean and free of debris.
- Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Avoid exposing the earbuds to extreme temperatures, humidity, or liquids.
8. Troubleshooting
If you encounter issues with your earbuds, refer to the following common solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not pairing/connecting | Bluetooth off on device, earbuds not in pairing mode, interference, previously paired device issue. |
|
| No sound or low volume | Volume too low, earbuds not properly seated, connection issue. |
|
| Charging issues | Dirty contacts, faulty cable/adapter, case battery low. |
|
| ANC not effective | Improper fit, environmental noise too high. |
|
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | A10536-B |
| Brand | Astrum |
| Connectivity Technology | Bluetooth 5.3 (Wireless) |
| Noise Control | Active Noise Cancellation (ANC) |
| Headphones Form Factor | In Ear |
| Ear Placement | In Ear |
| Control Type | Siri (Voice Assistant) |
| Material | Plastic |
| Product Dimensions | 6.1 x 4.8 x 2.6 cm; 50 g |
| Batteries | 3 Lithium Polymer batteries required (included) |
| Manufacturer | ASTRUM |
10. Warranty and Support
Astrum products are designed and manufactured to the highest quality standards. For warranty information and technical support, please refer to the warranty card included in your package or visit the official Astrum website. Keep your proof of purchase for warranty claims.
For further assistance, please contact Astrum customer service.



