1. Introduction
Thank you for choosing the ACEFAST T6 True Wireless Stereo (TWS) Earphones. These earphones are designed to provide a superior audio experience with features like Bluetooth 5.0 connectivity, Environmental Noise Cancellation (ENC) for clearer calls, and intuitive touch controls. This manual will guide you through the setup, operation, and maintenance of your new earphones.

Figure 1: ACEFAST T6 TWS Earphones and Charging Case
2. Package Contents
Please check the box for the following items:
- Earbuds (x2)
- Charging Case (x1)
- User Manual (x1)
- USB-C Charging Cable (x1)
- Replaceable Pads Set (S/M/L eartips x3 pairs)
- Silicone Protective Case (x1)

Figure 2: What's in the Box
3. Product Overview
The ACEFAST T6 earphones feature a stylish clear charging case with an LED digital display, providing a modern aesthetic and practical functionality.

Figure 3: Earbuds in Stylish Clear Case

Figure 4: LED Digital Display showing battery level
The earphones are designed for comfortable wear and incorporate Environmental Noise Cancellation (ENC) with 4 microphones for clear call quality.

Figure 5: Comfortable to Wear design and battery life overview

Figure 6: Environmental Noise Cancellation (ENC) with 4 Mics
Each earbud features touch controls for easy management of calls and music playback.

Figure 7: Incredible Touch Control
The earphones utilize Bluetooth 5.0 technology for stable connection and support AAC+SBC decoding protocol for high-quality audio.

Figure 8: Earbud Internal Structure and Technology
4. Specifications
| Attribute | Value |
|---|---|
| Brand Name | ACEFAST |
| Model Name | TWS Wireless Bluetooth 5.0 Earphone |
| Material | ABS |
| Category | Earphones & Headphones |
| Style | In-ear |
| Communication | True wireless |
| Wireless Type | Bluetooth |
| Bluetooth Version | 5.0 |
| Connectors | Type C |
| Driver Diameter | 12mm |
| Impedance Range | up to 32 Ω |
| Resistance | 32Ω |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 30dB |
| Vocalism Principle | Dynamic |
| With Microphone | Yes |
| Features | With microphone, Apple Siri Support |
| Active Noise-Cancellation | No |
| Volume Control | Yes |
| Control Button | No (Touch Control) |
| Charging Method | Charging case (Type-C) |
| Headphone Pads Material | Silicone |
| Waterproof | No |
| Support Memory Card | No |
| Talking/Music Time | About 5 hours (at 70% volume) |
| Charging Case Battery Capacity | 500mAh (supports charging earbuds 4 times) |
| Function | for Video Game, Common Headphone, For Mobile Phone, HiFi Headphone, Sport |
| Certification | CE, EAC, FCC, RoHS, KC, BQB |
| Origin | Mainland China |
5. Setup Guide
5.1 Initial Setup: Removing Protective Stickers
Before first use, ensure you remove the transparent protective stickers from the charging contacts on each earbud. Failure to do so will prevent the earbuds from charging and functioning correctly.

Figure 9: Correct way to remove protective stickers
- Carefully tear off the transparent sticker from the charging contacts of both earbuds.
- Place the earbuds back into the charging case. The earbuds should now charge and be ready for pairing.
5.2 Pairing with Your Device
- Power On: Take the earbuds out of the charging case. They will automatically power on and enter pairing mode.
- Activate Bluetooth: On your smartphone or other Bluetooth-enabled device, go to the Bluetooth settings and turn on Bluetooth.
- Select Device: Look for "ACEFAST T6" in the list of available devices and select it to connect.
- Confirmation: Once connected, you will hear an audio prompt, and the earbuds will be ready for use.
6. Operating Instructions
The ACEFAST T6 earphones feature intuitive touch controls on both earbuds. The following gestures control various functions:

Figure 10: Touch Control Operations
6.1 Call Control
- Power On: Take out the headset, it will automatically turn on.
- Shutdown: The headset is automatically turned off when it is placed in the charging case.
- Answering a Call: When there is an incoming call, double-click the multi-function key (touch sensor).
- End the Call: During the call, double-click the multi-function key (touch sensor).
6.2 Music Control
- Volume ±: Click the multi-function key on the right / left headset.
- Voice Assistant: Long touch the left / right headset multi-function key for 2 seconds.
- Play / Pause: Double-click the multi-function key L / R.
- Next / Previous Song: Triple-click the multi-function key of the right / left headset.
6.3 Single or Double Earbud Mode
The earphones support seamless switching between using both earbuds (double earbud mode) or just one (single earbud mode).

Figure 11: Free Switch between Single and Double Earbud Mode
7. Charging
To charge your ACEFAST T6 earphones and charging case:
- Place the earbuds into the charging case. The LED digital display on the case will show the battery level.
- Connect the provided USB-C charging cable to the charging port on the case and to a suitable power source.
- The charging case has a 500mAh battery capacity and supports fast charging, allowing for approximately 20 hours of total usage time with the case.
Video 1: Product demonstration showing charging and various colors.
8. Maintenance
- Keep the earbuds and charging case clean and dry.
- Avoid exposing the device to extreme temperatures, humidity, or corrosive substances.
- Clean the charging contacts on the earbuds and inside the case regularly with a dry, soft cloth to ensure proper charging.
- Store the device in a cool, dry place when not in use.
9. Troubleshooting
- Earbuds not charging or showing "OK" on display: Ensure the transparent protective stickers have been completely removed from the charging contacts on both earbuds. Place them back in the case firmly.
- Earbuds not pairing: Make sure Bluetooth is enabled on your device and the earbuds are in pairing mode (taken out of the case). If issues persist, try forgetting the device in your phone's Bluetooth settings and re-pairing.
- One earbud not working: Place both earbuds back into the charging case, close the lid, wait a few seconds, then take them out again to reset the connection.
- Low volume or poor sound quality: Check the earbud fit and try different sized eartips for a better seal. Ensure the earbuds are clean and free of debris.
10. User Tips
- Always remove the protective film from the earbuds' charging contacts before first use to avoid charging issues.
- The ACEFAST T6 earphones are designed for comfort; experiment with the included S/M/L eartips to find the best fit for your ears.
- Keep the charging case charged to maximize the total listening time of your earbuds on the go.
11. Certifications
The ACEFAST T6 TWS Earphones comply with the following certifications:
- CE
- EAC
- FCC
- RoHS
- KC
- BQB
12. Warranty and Support
For warranty information and technical support, please refer to the official ACEFAST website or contact your retailer. Keep your proof of purchase for any warranty claims.