Introduction
The Monster Airstar A05 Sleep Earphones are designed to provide a comfortable and immersive audio experience, especially for sleep and relaxation. Featuring an ultra-slim, ergonomic design, Bluetooth 6.0 connectivity, passive noise cancellation, and a dedicated sleep mode, these earbuds are perfect for various activities including sleeping, meditation, commuting, and workouts.


Package Contents
Please check the box for the following items:
- A05 Earbuds × 2
- Charging Case × 1
- Type-C Charging Cable × 1
- User Manual × 1 (This document and a PDF version are available)
- Packaging Box × 1
Product Overview
The Airstar A05 earbuds feature an ultra-slim body with an ergonomic curved ear-fitting design, ensuring weightless comfort and no ear pressure, even when lying on your side. They are equipped with soft air silicone earplugs that fit different ear shapes perfectly.


Setup
1. Charging the Earbuds and Case
Before first use, ensure both the earbuds and the charging case are fully charged. Use the provided Type-C charging cable to connect the charging case to a power source.
- Charging Case Battery: 200mAh
- Earbud Battery: 28mAh
- Charging Time: Approximately 1.5 hours

2. Bluetooth Pairing
The Airstar A05 uses a new-generation low-power Bluetooth 6.0 chip for fast and stable connections.
- Initial Pairing: Open the charging case. The earbuds will automatically enter pairing mode. On your device (smartphone, tablet, laptop), go to Bluetooth settings and select "Monster Airstar A05" from the list of available devices.
- Fast Pairing: Supports one-second fast pairing for instant music playback and ultra-stable calls.
- Auto Power Off: The earbuds automatically power off if pairing times out.

3. Wide Compatibility
The earbuds are fully compatible with Windows, iOS, and Android systems, allowing seamless cross-device connection to smartphones, desktops, tablets, and laptops.

Operating Instructions
Smart Touch Controls
The Airstar A05 supports one-handed blind operation with convenient and accurate touch controls to avoid accidental touches.

Normal Mode
- Long Tap L: Volume down
- Touch L for 2s: Voice assistant
- Long Tap R: Volume up
Music Playback
- Triple tap L: Previous track
- Double tap L/R: Play/Pause
- Triple tap R: Next track
Hands-Free Call
- Double tap L/R: Answer/End call
- Touch L/R for 2s: Reject call
Sleep Mode
- Touch R for 2s: Enter sleep mode
- Single tap R: Next white noise (Note: In sleep mode, you cannot play music from your device.)

Power On/Off
- Touch L/R for 3s: Power On/Off
Clear Pairing (Reset)
- Powered on but not connected: Tap L/R 5 times → L/R earbuds power off (All pairing & connection data cleared)
- Powered on and connected (hidden operation): Tap L/R 5 times → long press for 10s within 3s (Clears pairing between devices then powers off)
Key Features
- Premium Speaker Unit: Built with a high-performance composite diaphragm and 6mm high-sensitivity speaker unit, delivering balanced triple-frequency performance with outstanding sound quality.
- Outstanding Sound Quality: Delivers premium audio performance with excellent high-frequency extension and exquisite detail restoration, combined with intelligent audio decoding technology for high-resolution immersive sound.
- Tiny Earbuds, Powerful Bass: Compact design with stunning bass performance, solid deep dive, rich resonance, crisp textured beats, and strong rhythmic tension.
- ENC Call Noise Cancellation: Smart ENC noise reduction technology identifies and filters out over 98% of background noise while amplifying human voice for crystal clear calls.
- IPX4 Waterproof: Precision structural design and nano-coating technology provide excellent waterproof and sweatproof performance, resisting splashes and daily rain.





Maintenance
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth. For ear tips, gently wipe with a damp cloth and mild soap if necessary, then dry thoroughly before reattaching.
- Water Exposure: While IPX4 rated, avoid submerging the earbuds in water. Dry them completely if they get wet from splashes or rain.
- Storage: Store the earbuds in their charging case when not in use to protect them and keep them charged. Avoid extreme temperatures.
- Charging Port: Keep the Type-C charging port free of dust and debris.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not charging | Charging cable or adapter issue; dirty charging contacts; earbuds not seated correctly. | Ensure cable and adapter are working. Clean charging contacts on earbuds and case. Reseat earbuds firmly in the case. |
| Cannot pair with device / Disconnects frequently | Earbuds not in pairing mode; device Bluetooth off; interference; low battery. | Ensure earbuds are in pairing mode (open case). Turn device Bluetooth off and on. Move closer to the device. Charge earbuds. Try clearing pairing data (see 'Clear Pairing' section). |
| No sound / Low volume | Volume too low on device/earbuds; earbuds not connected; dirty ear tips. | Adjust volume on both device and earbuds. Reconnect earbuds. Clean ear tips. |
| Sleep mode not working as expected | Incorrect touch gesture; device playing music. | Ensure you are touching the right earbud for 2 seconds. Remember that music playback from your device is not supported in sleep mode. |
| Voice assistant not activating | Incorrect touch gesture; device settings. | Ensure you are touching the left earbud for 2 seconds. Check your device's voice assistant settings. |
Specifications
| Parameter | Detail |
|---|---|
| Product Model | Airstar A05 |
| Bluetooth Version | V6.0 |
| Bluetooth Range | 10m - 20m (Maximum wireless range) |
| Charging Case Battery | 200mAh |
| Earbud Battery | 28mAh |
| Charging Time | Approx. 1.5 Hours |
| Single Playtime | Approx. 3-4 hours |
| Calling Time | Approx. 3 hours |
| Total Playtime (with case) | Up to 12 hours |
| Waterproof Rating | IPX4 |
| Driver Size | φ6mm |
| Driver Impedance | 16Ω±15% (up to 32Ω) |
| Sensitivity | 103±3dB |
| Frequency Response | 20-20kHz |
| Material | PC, ABS, Silica Gel |
| Features | Waterproof, With microphone, Apple Siri Support, Google Assistant Support, Sound Isolating, Control Button, Volume Control |

User Tips
- Comfort for Side Sleepers: The ultra-slim design is specifically made for side sleepers. Ensure the earbuds are properly seated to avoid discomfort.
- White Noise Functionality: Utilize the built-in white noise feature in sleep mode for easier relaxation and falling asleep. Remember, you cannot play music from your device simultaneously in this mode.
- Regular Cleaning: To maintain optimal sound quality and hygiene, regularly clean the ear tips and charging contacts.
Support & Warranty
For further assistance, technical support, or warranty information, please refer to the official Monster support channels or the comprehensive user manual PDF available at this link.
A product demonstration video is also available: