1. Introduction
Thank you for choosing the TRANSFORMERS TF-T28 Earphones. These true wireless stereo (TWS) earbuds are designed to provide a high-fidelity audio experience, clear communication, and low-latency performance for gaming and everyday use. Featuring Bluetooth 5.4 connectivity, IPX4 waterproofing, and a comfortable in-ear design, the TF-T28 is built for versatility and durability.
2. Package Contents
Please check the box for the following items:
- 1 x Packaging box
- 2 x TRANSFORMERS TF-T28 Bluetooth Earphones (Left and Right)
- 1 x Charging Case
- 1 x Charging Cable (Type-C)
- 1 x User Manual
3. Product Overview
The TRANSFORMERS TF-T28 earphones are available in two distinct designs: a yellow 'Bumblebee' theme and a black 'Optimus Primal' theme. Both versions offer the same advanced features and performance.
Bumblebee themed TF-T28 earphones and charging case.
Optimus Primal themed TF-T28 earphones and charging case.
The earphones feature a new generation Bluetooth V5.4 chip, enhancing signal penetration and reducing sound quality loss and delay. They are designed with IPX4 life-grade waterproofing, making them resistant to daily rain and sweat.
New generation Bluetooth V5.4 chip for enhanced connectivity.
IPX4 life-grade waterproof design resists daily rain and sweat.
The TF-T28 earphones are engineered for a comfortable and secure fit, with a lightweight design (approximately 3.2g per earbud) and skin-friendly materials. The ergonomic design ensures a 98.86% fitting degree for various ear shapes.
Ergonomic design for a comfortable and secure fit, with optimized weight distribution.
The earphones feature a 13mm giant diaphragm for Hi-Fi level sound quality, delivering rich and vivid audio. They also incorporate AI call noise reduction technology for clear voice transmission during calls, even in noisy environments.
13mm giant diaphragm for high-fidelity sound with low distortion.
AI call noise reduction technology for clear voice calls.
4. Setup
4.1 Charging the Earphones and Case
Before first use, fully charge the earphones and charging case. The charging case provides additional power for extended listening.
- Place the earphones into the charging case.
- Connect the provided Type-C charging cable to the charging port on the case and a USB power source (e.g., wall adapter, computer USB port).
- The indicator lights on the case will show the charging status. Once fully charged (approximately 1.5 hours for the case), the lights will indicate completion.
- A single earbud charge provides approximately 5 hours of music time. The charging case extends the total battery life to up to 40 hours.
4.2 Bluetooth Pairing
To connect your TF-T28 earphones to your device:
- Ensure the earphones are charged.
- Open the charging case. The earphones will automatically enter pairing mode, indicated by flashing lights (if applicable, refer to specific light indicators on the product).
- On your device (smartphone, tablet, computer), go to the Bluetooth settings.
- Search for available devices and select "TRANSFORMERS TF-T28" from the list.
- Once connected, you will hear a confirmation tone, and the indicator lights on the earphones will change (e.g., turn off or solid).
- The earphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
5. Operating Instructions
5.1 Touch Controls
The TF-T28 earphones feature smart touch controls on each earbud. The functions are as follows:
Detailed touch control functions for the TF-T28 earphones.
| Gesture | Right Earbud Function | Left Earbud Function |
|---|---|---|
| Tap once | Volume up | Volume down |
| Tap twice | Answer a call / Hang up the phone | |
| Tap three times | Previous song | Next song |
| Press and hold for two seconds | Switch Game/Music mode | Call voice assistant / Reject call |
5.2 Switching Modes
The TF-T28 earphones support dual modes: Music Mode and Game Mode.
- Music Mode: Provides a wide live sound field, enhances vocals, and delivers bright and clear tones for an immersive listening experience.
- Game Mode: Offers ultra-low latency (down to 0.06 seconds) for stable audio and precise sound positioning, giving you a competitive edge in gaming.
To switch between modes, press and hold the right earbud for two seconds.
6. Maintenance
To ensure the longevity and optimal performance of your TF-T28 earphones, follow these maintenance guidelines:
- Cleaning: Regularly wipe the earphones and charging case with a soft, dry, lint-free cloth. Avoid using harsh chemicals or abrasive materials.
- Water Resistance: The earphones are IPX4 rated, meaning they are resistant to splashing water and sweat. Do not submerge them in water or expose them to heavy rain. Dry them thoroughly if they get wet.
- Storage: When not in use, store the earphones in their charging case to protect them from dust and damage. Keep them in a cool, dry place away from extreme temperatures.
- Charging: Use only the provided charging cable or a certified Type-C cable. Avoid overcharging or completely draining the battery frequently.
7. Troubleshooting
If you encounter any issues with your TF-T28 earphones, try the following steps:
- No Sound/Connection Issues:
- Ensure both earphones are charged.
- Turn off and on your device's Bluetooth, then try pairing again.
- Forget the "TRANSFORMERS TF-T28" device in your phone's Bluetooth settings and re-pair.
- Ensure the earphones are within the 10-meter transmission range of your device.
- Only One Earbud Working:
- Place both earbuds back into the charging case, close the lid, wait a few seconds, then take them out again. This often resets the connection.
- Check if both earbuds have sufficient battery.
- Charging Problems:
- Ensure the charging cable is securely connected to both the case and the power source.
- Try a different charging cable or power adapter.
- Clean the charging contacts on the earbuds and inside the case with a dry cotton swab.
- Touch Controls Not Responding:
- Ensure your fingers are clean and dry when using touch controls.
- Try restarting the earphones by placing them in the case and taking them out.
8. Specifications
Key technical specifications of the TF-T28 earphones.
| Feature | Specification |
|---|---|
| Model | TRANSFORMERS TF-T28 |
| Bluetooth Version | V5.4 |
| Waterproof Level | IPX4 |
| Transmission Distance | Approx. 10 meters (33 feet) |
| Speaker Diameter | φ13mm |
| Speaker Impedance | 32Ω ±15% |
| Music Time (Single Charge) | Approx. 5 hours |
| Total Battery Life (with Charging Case) | Up to 40 hours |
| Headphone Battery Capacity | 30mAh |
| Charging Case Battery Capacity | 200mAh |
| Control Method | Touch Operation |
| Speaker Power | 5mW |
| Charging Time (Case) | ≤1.5 hours |
| Rated Input | 5V-200mA |
| Material | Plastic |
| Sound Isolating | Yes |
| Number of Drivers | 2 |
| Total Harmonic Distortion | 1% |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 96dB |
| With Microphone | Yes (AI Call Noise Reduction) |
| Active Noise-Cancellation | No (Features AI Call Noise Reduction, not ANC for listening) |
| Weight (per earbud) | Approx. 3.2g |
9. User Tips
- For optimal sound quality and call clarity, ensure the earbuds are properly seated in your ears.
- Regularly clean the earbud tips and charging contacts to prevent debris buildup that could affect performance.
- If experiencing audio dropouts, try to reduce interference by moving away from other wireless devices or obstacles.
- Utilize Game Mode for competitive gaming to benefit from the ultra-low latency.
- Keep the charging case charged to maximize the total listening time on the go.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
