1. Safety Information
- Keep away from water.
- Do not leave on a hot surface.
- Unplug when not in use.
- Keep out of reach of children.
- Do not touch hot plates.
- Use only as directed.
2. Setup
Before first use, ensure the JMFONE Cordless Hair Straightener is fully charged. Connect the provided USB-C cable to the device and a compatible USB power adapter. The battery indicator will show charging status.

Image: The JMFONE Cordless Hair Straightener with its USB-C charging port and battery capacity (4800mAh), working time (approx. 45 minutes), and charging time (2.5 hours) indicated. A warning advises to charge fully before first use and not to use during charging.
- Charge Fully: Connect the device using the USB-C cable until the battery indicator shows a full charge.
- Do Not Use While Charging: For safety and optimal battery life, avoid operating the straightener while it is connected to a charger.
3. Operating Instructions
The JMFONE Cordless Hair Straightener is designed for convenient and effective hair styling. Follow these steps for optimal results:
- Power On: Press and hold the power button for 3 seconds to turn the device ON.
- Select Temperature: Click the power button to cycle through the available temperature settings (160°C, 180°C, 200°C). The indicator lights will show the selected temperature.
- Heat Up: Allow the device to heat up to the selected temperature. It features fast heating, reaching desired temperatures in approximately 15 seconds.
- Style Hair: Run the device through your hair evenly and slowly. The ceramic plates help protect hair from damage.
- Power Off: Press and hold the power button for 3 seconds to turn the device OFF. Push the safety switch back to lock the plates.
- Auto-Shutoff: For safety, the device will automatically turn off after 50 minutes of inactivity.

Image: This image illustrates the three adjustable heat levels: 160°C for delicate colored hair, 180°C for normal textured hair, and 200°C for thick or wavy hair. It also shows the auto-switch, motion control, and easy-to-use steps for pushing the safety switch up to turn on, clicking to choose temperature, pressing 3 seconds to turn off, and covering back after use.

Image: The straightener heats up in 15 seconds. It features ceramic plates designed to protect hair from damage and a baffle to protect hands from accidental heat.
Video Demonstrations:
Video: A seller-provided video demonstrating the use of the JMFONE Cordless Rechargeable Hair Straightener, showcasing its portability and styling capabilities.
Video: A seller-provided video demonstrating the quick heating and color of the JMFONE Cordless Hair Straightener.
4. Maintenance
- Cleaning: Ensure the device is turned off and completely cool before cleaning. Wipe the ceramic plates and exterior with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the straightener in a cool, dry place. Use the provided closing lock to keep the plates together for compact storage and protection.

Image: The JMFONE Cordless Hair Straightener is shown as a travel-sized device with no cord, featuring a closing lock and heat protection for safe and convenient storage.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not turning on. | Low battery or not powered on correctly. | Ensure the device is fully charged. Press and hold the power button for 3 seconds. |
| Not heating up sufficiently. | Incorrect temperature setting or low battery. | Select a higher temperature setting. Ensure the device is fully charged for optimal performance. |
| Hair feels damaged after use. | Temperature too high for hair type. | Reduce the temperature setting. Consider using a heat protectant spray. |
6. Specifications
- Brand: JMFONE
- Model Number: JM3
- Product Dimensions: 9 x 1.7 x 1.7 inches
- Item Weight: 12 ounces
- Battery: 1 Lithium Ion battery (included), 4800mA capacity
- Material: Ceramic plates
- Color: Pink
- Product Benefits: Straightening
- Heat Settings: Adjustable (160°C, 180°C, 200°C)
- Charging: USB-C
7. Warranty and Support
For warranty information or product support, please refer to the contact details provided with your purchase or visit the official JMFONE website. Keep your proof of purchase for any warranty claims.