Lian Li SL Flex 120 Uni Fan ARGB Reverse PWM 120mm Black 3 Pack

The Lian Li UNI FAN SL FLEX 120 Reverse ARGB is a 120mm case fan designed to combine efficient cooling, customisable RGB lighting and streamlined cable management for gaming PCs and enthusiast builds. Featuring a Fluid Dynamic Bearing (FDB) and durable PBT construction, the reverse-blade design allows the fan to provide intake airflow while keeping its visually appealing side facing the interior of the case, making it ideal for showcase builds with carefully planned airflow layouts. The fan operates at speeds of up to 2000 RPM, delivering airflow of up to 56.3 CFM and static pressure of 2.0 mmH2O, with a maximum noise level of 29 dBA. Its integrated 52-LED ARGB lighting system features dual-sided infinity mirrors and independently controllable lighting zones, creating layered illumination that complements other compatible components. The modular interlocking design simplifies installation and reduces cable clutter, while the FLEX Receiver integrates fan power, speed monitoring and lighting control into a compact connection system. PWM fan-speed control allows cooling performance to be adjusted to suit system requirements, while support for L-Connect 3 software and compatible 5V 3-pin ARGB motherboard synchronisation provides flexible lighting customisation. Measuring 120 x 124.5 x 28mm, this black reverse-blade single-fan variant is suited to individual fan replacements, targeted intake cooling and custom PC configurations where airflow direction, coordinated lighting and a clean internal appearance are important.

Features

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Uni Fan SL Flex

• 120 mm daisy-chainable reverse fans.
• Dual-sided infinity mirrors and independently controlled ARGB zones create layered illumination from every angle.
• Aluminium side nameplate and black hub medallion deliver a refined, premium finish.
• FLEX Receiver integrates power, RPM reporting, fan-speed, and lighting control into one compact module.
• Supports L-Connect 3 and motherboard PWM / 5V 3-pin ARGB synchronisation.
• L-Wireless enables unified control of up to 10 channels of compatible LIAN LI devices.
• Each receiver supports up to four matching fans for streamlined cable routing and expansion.
• L-Connect 3 offers custom device naming, fan grouping, fan curves, and lighting effects.
• FDB bearing delivers reliable cooling at up to 2000 RPM and 66.5 CFM.

Next-Gen Connections. Endless Flexibility

• 2 Control Modes
• Aluminium Nameplate
• L-Wireless Sync
• Infinity Mirror
• Dual Light Zone
• FDB Bearing
• Daisy-Chain Design
• Support MB Control

Multi-Angle Infinity Glow

Dual-sided infinity mirror lighting brings layered depth from every angle, with independently controlled lighting zones for a richer, more immersive RGB presence.

Uni Fan SL Wireless VS Uni Fan SL Flex

UNI FAN SL FLEX upgrades the UNI FAN SL Wireless design with a signature infinity mirror, aluminium plate, and enhanced lighting zones, delivering a more refined RGB look while keeping flexible control options for your build.

Control Refined into One Module

The FLEX Receiver streamlines power, RPM reporting, fan speed, and lighting control into one compact module for a cleaner and more refined setup.

Flexible Control, Your Way

Using the included FLEX receivers, the UNI FAN FLEX Series supports both L-Connect 3 and motherboard control, giving you the flexibility to choose the control mode that best fits your setup.

• Uni Fan SL Flex Build - L-Wireless Controller (The L-Wireless Controller is included with the 3-pack fan version only.)
• Uni Fan SL Flexbuild - 5V 3-PIN Cable (Connect the fan's 5V 3-Pin cable directly to the MB headers.)

Built for Motherboard Sync

Connect the 4-Pin PWM and the optional 5V 3-Pin ARGB cable to synchronise fan speed and lighting through your motherboard BIOS or RGB software for a seamless system-wide lighting experience.

Note: Motherboard sync can be used without L-Connect 3. When the wireless receiver is connected and bound in L-Connect 3, users can freely switch between motherboard sync and L-Wireless lighting control.

Unified Wireless Ecosystem

Manage up to 10 channels of compatible LIAN LI devices through 2.4GHz wireless control in L-Connect 3, unifying FLEX fans, wireless UNI FANs, AIOs, cases, Strimmer Wireless, and more.

Personalised Control Through L-Connect 3

L-Connect 3 brings fan speed, fan curves, and lighting effects into one intuitive interface, allowing users to fine-tune cooling performance and RGB style with presets or custom profiles.

Custom Device Naming

Rename devices, arrange fan order, and manage fan groups in L-Connect 3 to mirror your actual build layout, making setup and future adjustments easier.

Quiet Performance, Balanced Cooling

With an FDB bearing, UNI FAN SL FLEX balances airflow, static pressure, and acoustics to deliver reliable cooling performance with quiet operation.

Refined Centre Detail

A clean black hub medallion complements the infinity mirror lighting, giving UNI FAN SL FLEX a sharper and more refined visual finish.

Expandable Fan Grouping

Each FLEX Receiver supports up to 4 matching UNI FAN SL FLEX fans for simple and organised fan group expansion.

Note: For optimal RPM accuracy, group fans with the same blade orientation on each receiver.

3-Year Warranty

Built for long-term reliability, UNI FAN SL FLEX is backed by a 3-year warranty for greater peace of mind.