Mendi

Mendi

Mendi Headset – fNIRS Neurofeedback System for Concentration and Cognitive Function Training

The Mendi Headset is a portable neurofeedback training device that allows you to observe changes in the brain's prefrontal cortex activity in real time and conduct concentration training sessions using a mobile app.
The device uses fNIRS (Functional Near-Infrared Spectroscopy) technology.
Unlike EEG devices, Mendi does not measure electrical activity or brain waves. Using red and near-infrared light, it monitors changes in blood flow and hemoglobin oxygenation in the prefrontal cortex (PFC).
The prefrontal cortex is a region of the brain associated with attention control, decision-making, working memory, and the regulation of behavior and emotions, among other functions.
The measurement is non-invasive – the device does not use contact electrodes and does not conduct electrical or magnetic brain stimulation. Data from the sensors is transmitted wirelessly to the Mendi app, which converts the measured activity into feedback presented to the user during neurofeedback training.

Specifications

Measurement technology: fNIRS – functional near-infrared spectroscopy.
Measured parameter: changes in blood flow and blood oxygenation associated with prefrontal cortex activity.
Measurement area: PFC – prefrontal cortex.
Measurement type: optical, non-invasive.
EEG measurement: no.
Brain stimulation: no – the device performs a measurement function and provides neurofeedback.
Connectivity: Bluetooth.
Additional sensors: accelerometer and gyroscope.
Charging interface: USB Type-C.
Power supply: built-in rechargeable battery.
Battery life: up to approximately 5 hours.
The manufacturer also states that the battery capacity is up to approximately 60 short training sessions on a single charge.
Construction: forehead strap.
Size: adjustable, one size fits all.
Recommended user age: from approximately 5 years. Communication with the mobile device is wireless via Bluetooth.

Software Required

To use Mendi, you must install the free Mendi App.
The app is available for smartphones running Apple iOS and Android.
According to the manufacturer's current, dedicated compatibility page, the recommended minimum requirements are:
- iPhone – iOS 16.0 or later,
- Android – Android 8.0 or later.
The Mendi app is optimized for smartphones.
The manufacturer does not currently offer a Mendi app for Windows or macOS computers.
Installing the app on some tablets may be possible, but the manufacturer does not currently recommend tablets as the primary device for operating the system.
Bluetooth is required to connect the band to the smartphone.
On Android, the app may require location permission, as this is used by Android when searching for Bluetooth devices.
An internet connection is required for logging in and synchronizing data.
Each user can have a separate account, allowing training data, results, and progress history to be saved individually. You can create an account using your email address or supported Apple/Google login methods. Using the app's basic features doesn't require a paid subscription or recurring fees.

How the training works

The user places the Mendi headband on their forehead, with the sensors positioned directly above the skin and below the hairline.
Optical sensors record changes in blood flow and oxygenation associated with changes in prefrontal cortex activity.
Data is transmitted to the mobile app in real time.
The app provides feedback in the form of an interactive training session resembling a simple game.
The user's task is to maintain an appropriate level of concentration and observe the app's response to changes in the recorded signal.
After training, the app allows users to analyze the results of individual sessions and monitor performance changes over time.
Mendi Score allows users to compare current workouts with previous results and monitor exercise consistency.

Purpose

Concentration and sustained attention training,
Self-regulation training,
Practice of consciously controlling one's state of focus,
Executive function training related to the activity of the prefrontal cortex,
Supporting working memory training,
Training stress response control,
Emotional regulation training,
Mental exercises before studying or working requiring concentration,
Mental training for individuals performing tasks requiring prolonged concentration,
Mental training for athletes,
Use as a component of mindfulness training and general mental well-being,
Observing changes in training results over a longer period.

Advantages

Real-time neurofeedback – the user receives immediate feedback on changes in measured prefrontal cortex activity.
fNIRS technology instead of EEG – no traditional EEG electrodes, gel, or skin preparation required, as is typical of many EEG systems.
Non-invasive measurement – ​​the device uses red and near-infrared light and does not conduct electrical brain stimulation.
Simple operation – putting on the wristband, launching the app, and connecting via Bluetooth allows you to quickly start training.
Mobility – the small device can be used at home, while traveling, at work, or before sports training.
Gamified training – the use of game elements makes it easier for the user to observe neurofeedback and can encourage exercise regularity.
Progress monitoring – the app records session results and allows you to monitor training history and trends.
Multiple user accounts – a single wristband can be shared by several people, each with their own account and separate performance history. No subscription required – the basic Mendi app is available without a monthly or annual subscription.
Long battery life – the battery provides up to approximately 5 hours of use between charges.
No consumables – no disposable electrodes or conductive gel are required for standard use.

Important Information

Mendi is a device intended for neurofeedback, cognitive training, and general well-being.
Mendi is not a certified medical device.
The device is not intended to diagnose, treat, or monitor neurological or mental health conditions.
It should not be presented as a device for the treatment of ADHD, autism, depression, anxiety disorders, insomnia, or other conditions.
For medical or therapeutic applications, the user should consult an appropriate professional.