Introduction
The SIYINMM Beard Straightener is designed to efficiently style and straighten beards and hair. This device integrates a comb with a heating element to provide quick and effective styling results. Please read this manual thoroughly before first use to ensure safe and optimal operation.

An image showing the SIYINMM Beard Straightener from multiple angles, alongside its retail packaging and accessories, including a heat-resistant case and a small comb.
Important Safety Instructions
To reduce the risk of burns, electrocution, fire, or injury to persons, always follow these basic safety precautions:
- Always ensure the device is unplugged immediately after use and before cleaning.
- Do not use this appliance near water, such as in a bathtub, shower, or sink.
- Keep the device out of reach of children.
- Never operate the appliance if it has a damaged cord or plug, if it is not working properly, or if it has been dropped or damaged.
- The device features an automatic shut-off function after 30 minutes of inactivity to prevent overheating.
- The anti-scald design, with higher rubber comb teeth, protects your skin from direct contact with the heating elements.
- Do not attempt to disassemble or repair the device yourself. Contact qualified service personnel for repairs.

An illustration demonstrating the PTC heating technology and the anti-scald design of the SIYINMM Beard Straightener, showing the shorter ceramic heating teeth protected by higher rubber comb teeth, and indicating 60-second fast heating.
Product Overview
The SIYINMM Beard Straightener features an ergonomic design for comfortable handling and efficient styling. Familiarize yourself with the key components:
- Silicone Heat-resistant Case: For safe storage and travel.
- LCD Temperature Display: Shows the current temperature setting.
- On/Off Switch & Temperature Control: Powers the device on/off and adjusts heat settings.
- Denser Comb Teeth: Designed for effective styling and detangling.
- Ergonomic Handle: Provides a comfortable and secure grip.

A detailed diagram highlighting the key parts of the SIYINMM Beard Straightener, including the silicone heat-resistant case, LCD temperature display, on/off switch with temperature control, denser comb teeth, and ergonomic handle.
Getting Started (Setup)
- Unpack the SIYINMM Beard Straightener and ensure all components are present and undamaged.
- Place the device on a heat-resistant, flat surface.
- Plug the power cord into a suitable electrical outlet. The device supports universal voltage (110-240V).
Operating Instructions
- Power On: Press and hold the power button for a few seconds to turn on the device. The LCD display will illuminate and show the current temperature.
- Temperature Selection: Short press the power button to cycle through the available temperature settings. The device offers five options: 210°F, 250°F, 280°F, 320°F, and 360°F.
- Heating: Allow approximately 60 seconds for the device to reach the selected temperature. The LCD display will indicate when the desired temperature is achieved.
- Preparation: Ensure your beard or hair is clean and dry before use. For best results, apply a beard oil or heat protectant if desired.
- Styling: Slowly comb through sections of your beard or hair, starting from the roots and moving towards the ends. Avoid holding the device in one spot for too long.
- Power Off: After styling, press and hold the power button for a few seconds to turn off the device. Unplug the power cord from the outlet.
Recommended Temperature Settings:
- Thin/Fine Beard/Hair: 210°F - 280°F
- Normal/Wavy Beard/Hair: 280°F - 320°F
- Curly/Thick/Long Beard/Hair: 360°F

A guide illustrating recommended temperature settings for different beard and hair types: 210-280°F for thin/fine, 280-320°F for normal/wavy, and 360°F for curly/thick/long.
Care and Maintenance
- Ensure the device is completely cool and unplugged before cleaning.
- Wipe the comb teeth and the body of the straightener with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals.
- Never immerse the device in water or any other liquid.
- Store the straightener in its provided silk bag or silicone heat-resistant case in a dry, safe place when not in use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Not plugged in correctly or power button not pressed sufficiently. | Check power connection. Ensure the power button is pressed and held until the display illuminates. |
| Device is not heating up. | Insufficient warm-up time or incorrect temperature setting. | Allow approximately 60 seconds for the device to reach the desired temperature. Verify the temperature setting on the LCD display. |
| Beard/hair not straightening effectively. | Beard/hair is wet, incorrect temperature, or too fast styling. | Ensure beard/hair is completely dry before use. Select an appropriate temperature setting for your hair type. Comb through sections slowly and evenly. |
Product Specifications
- Product Dimensions: 7.56 x 1.26 x 1.02 inches
- Product Weight: 9.95 ounces
- Brand: SIYINMM
- Model: B082FJGR3L
- Color: Gray
- Material: Ceramic, Rubber
- Power Source: Electric
- Voltage: 110-240V (Universal)
- UPC: 735551041027, 735551000864
- Manufacturer: SIYINMM

An image showing the compact dimensions of the SIYINMM Beard Straightener, highlighting its portability and universal voltage compatibility (110-220V) for travel.