1. Introduction
Thank you for choosing the AOC Portable Bluetooth Speaker ACS4311. This manual provides essential information for setting up, operating, and maintaining your speaker. Please read it carefully before use to ensure optimal performance and longevity of your device.
The AOC ACS4311 is a compact, durable, and high-performance portable Bluetooth speaker designed for both indoor and outdoor use. It features Bluetooth 5.4 for stable connections, IP67 waterproof and dustproof rating, up to 30 hours of playtime, and True Wireless Stereo (TWS) pairing for an enhanced audio experience.
2. What's in the Box
- AOC Portable Bluetooth Speaker ACS4311
- USB Type-C Charging Cable
- User Manual

3. Product Overview
Familiarize yourself with the speaker's components and controls.

Controls and Indicators:
- Power Button: Located on the front, typically a circular button. Press and hold to power on/off.
- Pilot Lamp: An indicator light (often orange) next to the power button, showing connection status (blinking for pairing, solid for connected).
- USB Type-C Port: Located on the side or back for charging.
- Built-in Microphone: For hands-free calling.
- Handle Strap: For portability.
4. Setup
4.1 Charging the Speaker
Before first use, fully charge your speaker. Use the provided USB Type-C cable to connect the speaker to a compatible USB power adapter (not included) or a computer's USB port.
- The pilot lamp will indicate charging status.
- A full charge provides up to 30 hours of playtime.

4.2 Power On/Off
- To Power On: Press and hold the Power Button for a few seconds until the pilot lamp illuminates.
- To Power Off: Press and hold the Power Button again for a few seconds until the pilot lamp turns off.
4.3 Bluetooth Pairing
Connect your speaker to a Bluetooth-enabled device.
- Ensure the speaker is powered on and the pilot lamp is blinking, indicating it's in pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "AOC ACS4311" from the list of devices.
- Once connected, the pilot lamp will stop blinking and remain solid.

4.4 True Wireless Stereo (TWS) Pairing
Pair two AOC ACS4311 speakers for a wider, more immersive stereo sound experience.
- Ensure both speakers are powered on and not connected to any other Bluetooth device.
- Quickly press the Power Button three times on each speaker.
- The speakers will automatically search for each other and pair.
- Once paired, the main speaker's pilot lamp will flash rapidly, while the secondary speaker's pilot lamp will remain off.
- Now, connect your device to the main speaker via Bluetooth as described in section 4.3.

5. Operating Instructions
5.1 Music Playback
- After successful Bluetooth pairing, you can play music from your connected device.
- Control volume and track selection directly from your device.

5.2 Call Functions
The built-in microphone allows for hands-free calling when connected to your smartphone.
- Answer/End Call: Press the Power Button once.
- Reject Call: Press and hold the Power Button for 2 seconds.

5.3 Waterproof and Dustproof Usage (IP67)
The speaker is rated IP67, meaning it is protected against dust ingress and can withstand temporary immersion in water up to 1 meter for 30 minutes.
- Ideal for use in bathrooms, by the pool, at the beach, or during outdoor activities.
- Ensure the charging port cover is securely closed before exposing the speaker to water or dust.
- Do not intentionally submerge the speaker for extended periods or beyond specified depths.

6. Maintenance
- Clean the speaker with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the charging port is dry before charging.
- Store the speaker in a cool, dry place when not in use.
- Avoid extreme temperatures and direct sunlight.
7. Troubleshooting
7.1 No Power
- Ensure the speaker is charged. Connect it to a power source using the USB Type-C cable.
- Press and hold the Power Button for a few seconds to ensure it's not just a short press.
7.2 Cannot Pair via Bluetooth
- Ensure the speaker is in pairing mode (pilot lamp blinking).
- Make sure Bluetooth is enabled on your device and it's within 33 feet (10 meters) of the speaker.
- Turn off and on your device's Bluetooth, then try searching again.
- If previously paired, try forgetting the device on your phone and re-pairing.
7.3 No Sound or Low Volume
- Increase the volume on both the speaker and your connected device.
- Ensure the speaker is properly connected via Bluetooth.
- Check if the speaker is muted.
8. Specifications
| Model Name | ACS4311 |
| Brand | AOC |
| Connectivity Technology | Bluetooth 5.4 |
| Speaker Type | Portable Speaker |
| Waterproof Rating | IP67 |
| Playtime | Up to 30 hours |
| Audio Output Mode | Stereo |
| Speaker Maximum Output Power | 5 Watts |
| Frequency Response | 2 KHz |
| Product Dimensions | 4"D x 2"W x 3"H |
| Item Weight | 15.5 ounces |
9. Official Product Video
Watch this video for a visual overview of the AOC Portable Bluetooth Speaker's features and capabilities.
10. Warranty and Support
AOC products are designed and manufactured to the highest quality standards. For warranty information and customer support, please refer to the warranty card included with your product or visit the official AOC website. Keep your purchase receipt as proof of purchase.





