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Lian Li

Flex PC Fan 12TL1F_Single (Black, 1 x 140mm, LED Reverse Blade)

  • Based on 49 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Sep 7
Order within 6 hours and 36 minutes
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Color: Black


Size: 1 x 140mm


Set name: LED Reverse Blade


Features

  • 2.4 GHz Wireless Signal for RGB & Fan Control: Next-gen RGB connectivity for PC case fan managing the 1.6 inch LCD (LCD version) and RGB lighting with a wireless controller. Customize your system's style by uploading your own personalized MP4, GIF, JPG, or PNG files
  • Quick Software Setup: The L-Connect 3 software provides the ability to set different fan speeds for each fan cluster to optimize different scenarios. Monitor the temperature and loading of your CPU and GPU, as well as the fan speed, instantly with built-in hardware monitor dashboards on the screen. The fan helps deliver more airflow and static pressure
  • RGB Effects: Customize the 40 LEDs with various lighting effects, enhanced by the wireless fan to create stunning illumination throughout your system
  • Easy Installation: UNIFAN interlocking system for ease of cable management. As well as, the slide-in daisy-chaining mechanism for easy configuration and holding the fans securely in place
  • Dual-Zone Lighting Technology: Advanced dual-zone lighting system allows independent control of different lighting zones on the fan for more creative and dynamic RGB customization options

Description

Previously Working TL/SL LCD Fans Now Uncontrollable (e.g. 2 or 3 fans, one screen fails to respond) 1.Confirm power source SATA or an external PSU. 2.L3 latest version. 3.Uninstall it from device manager, shut down, unplug and replug the fans, then restart to force Windows to rescan USB devices. 4. Remove USB cable and clean USB path. LCD Appears in L3 Utility But Won’t Respond 1.Confirm power source SATA or an external PSU. 2.L3 latest version. 3.Switch to another tab and back, then click the LCD group again. If the fan disappears, click Restart LCD to reinitialize USB. LCD Screen(s) Missing or Unresponsive, but Device Manager Detects Device 1.Limit total connected USB devices per USB 2.0 port to 6. 2. If you have two fans in one group and three in another, and also USB from AIO/pump, we recommend using EDGE USB PWM Fan Hub(EG-HUB01) or EDGE GOLD/ Platinum PSUs. The fan is only showing partial lighting 1. Check if the power is connected to SATA. 2. Swap the receiver between different fan groups to check if it's the receiver causing the issue. Faulty Wireless Dongle – Signs and Symptoms RMA dongle 1.Binding/unbinding and lightbulb click works, but lighting signals are received inconsistently or slowly by some fans. 2.L3 takes a long time to launch or until restart. 3.Lighting effects like Quick Sync or Merge show jittering/glitching.

Product Dimensions: 5.59"L x 1.1"W x 5.51"H


Brand: Lian Li


Power Connector Type: 2-Pin


Voltage: 12 volts


Wattage: 4.08 watts


Cooling Method: Air


Compatible Devices: Desktop


Noise Level: 31 db


Material: Plastic, Polybutylene Terephthalate


Maximum Rotational Speed: 1800 rpm


Power Connector Type: 2-Pin


Voltage: 12 volts


Wattage: 4.08 watts


Cooling Method: Air


Compatible Devices: Desktop


Noise Level: 31 db


Maximum Rotational Speed: 1800 rpm


Air Flow Capacity: 103.9 cfm


Item Dimensions L x W x H: 5.59"L x 1.1"W x 5.51"H


Material Type: Plastic, Polybutylene Terephthalate


Brand Name: Lian Li


Item Highlight: 140mm, 2.4 GHz Wireless Signal ARGB Fan Control, Dual-Zone Lighting, FDB, Controller NOT Included & Required, 14RTL1W1B


UPC: 840353048263


Set Name: LED Reverse Blade


Warranty Description: No Warranty


Number of Packs: 1


Manufacturer: LIAN LI


Number of Items: 1


Unit Count: 1 Count


Included Components: Fan, Cable


Model: 14RTL1W1B


Part Number: 14RTL1W1B


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Modern fan for the modern man...or woman
Color: White Size: 1 x 140mm Set name: LED Reverse Blade
Review Image by Jeremy
Review Image by Jeremy
These little (not really) fans are quite awesome and move a ton of air. They are quiet when idle and ramp up when they need to. They were easy to install and worked great in a daisy chain (3). The reverse blades make for a clean consistent look while functioning how you’d expect. Plus the lights look fantastic. Happy I got these. One thing to note, the fans have a slight purple / grey white to the plastic when not in use (powered off). At least compared to my white case (HAVN HS 420). This doesn’t bother me in the least however, since they still look great and cool like a beast. ... show more
Reviewed in the United States on January 5, 2026 by Jeremy
    • Expensive Premium
Color: Black Size: 1 x 140mm Set name: LED Reverse Blade
beautiful fans and the cooling is great. it cools the same as a 120 mm fan but it spins at slower speeds meaning it’s quieter. if you got money burning a hole in your pocket, these are perfect for that!
Reviewed in the United States on November 18, 2025 by Patrick
    • Performance fan
Color: Black Size: 3 x 120mm Set name: LED Reverse Blade
Like a stealth fans.
Reviewed in the United States on August 28, 2026 by Mel
    • Good purchase
Color: Black Size: 1 x 140mm Set name: LED Reverse Blade
High quality, and loads of airflow. Worth the price in my opinion.
Reviewed in the United States on May 9, 2026 by Amazon Customer
    • DO NOT BUY if you value your time, money, or ears!
Color: Black Size: 1 x 140mm Set name: LED Reverse Blade
These fans are the definition of style over substance. Yes, they look incredible — sleek design, premium aesthetics, and flashy marketing that makes you think you're buying top-tier hardware. But once you get past the looks, the actual product quality is shockingly bad for the price they're charging. I've had multiple fans fail the exact same way: grinding noises, wobbling, reduced RPMs. This wasn’t an isolated defect or bad luck, it happened across several different fans or different sizes, and different generations. For something marketed as a premium cooling solution, the reliability is embarrassing. Fans at half the price last longer and perform more consistently. What makes this even worse is the complete disaster that is their warranty service. After going through the hassle of documenting failures and contacting support, instead of receiving proper replacement fans, they sent a random box of unrelated products that had nothing to do with my claim. Then they completely ghosted me. No follow-up, no correction, no accountability. For a company charging premium prices, the customer support experience feels amateurish and borderline insulting. DO NOT BUY if you value your time or money. ... show more
Reviewed in the United States on May 16, 2026 by Matt
    • Read instructions carefully
Color: Black Size: 1 x 140mm Set name: LED Reverse Blade
Very nice
Reviewed in the United States on June 21, 2026 by AudrielBluez
    • Sleek Fan
Color: Black Size: 1 x 140mm Set name: LED Reverse Blade
Lian Li always makes really good and innovative products, their wireless uni fans are great and so easy to set up. Perfect for more black and sleek RGB PC builds.
Reviewed in the United States on January 19, 2026 by ludy
    • Powerful , quiet , beautiful, best clean looking fans
Color: White Size: 1 x 140mm Set name: LED Reverse Blade
The best PC fans I’ve used are silent and effectively cool my PC.
Reviewed in the United States on March 5, 2026 by AD

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