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Freedom 7D Wireless EEG Headset w/BrainAvatar Software

  • No gel, no paste, and no wires
  • Portable design & Bluetooth wireless transmission
  • Self-donned, ready to record EEG in under 5 minutes
  • 7 sensors, 10-20 International System placement
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This revolutionary dry EEG acquisition system requires no gel, no paste and no wires. Freedom is here!

The Freedom 7D is a research grade wireless EEG headset designed for ultra-rapid application of 7 sensors at locations corresponding to the 10-20 International System.

  • Dry Sensors: High quality through hair EEG without skin abrasion or gels
  • High Fidelity EEG signal: Comparable to that obtained with wet electrodes
  • Low Noise: Patented circuit design reduces environmental noise
  • Practical Headsets: Self-donned in less than 5 minutes and comfortable for hours
  • Wireless: Integrated amplifiers, digitizers, and Bluetooth transmitters
  • Motion Artifact Resistant: Mechanical isolation enables ambulatory use


The Freedom 7D's practicality, portability, and high signal quality opens the door to taking numerous applications that require rapid and non-intrusive EEG recording. Such applications include:

  • Neurofeedback
  • NeuroErgonomics
  • NeuroEconomomics / NeuroMarketing
  • NeuroEducation
  • Augmented Cognition
  • Brain Computer Interfaces
  • Biometrics
  • Cognitive Stress or Workload Monitoring
  • Psychological Research
  • Sports Peak Performance Training

The Freedom 7D replaces the DSI-6 prototype system (most information about DSI-6 and tutorial videos are applicable to DSI-7)


  • Self-donned and ready to record EEG in under 1 minutes
  • Comfortable for wearing continuously over 8 hours
  • Portable design suitable for light ambulation in office or lab environment
  • 7 sensors positioned at choice of F3, F4, C3, C4, Pz, P3, P4 locations of the 10-20 International System
  • Linked-Ears earclip mounted active sensors
  • Continuous impedance monitoring
  • BlueTooth wireless transmission with sampling at 300Hz
  • Rechargeable Li-ion batteries allow continuous operation
  • 4-bit digital trigger input
  • Adjustable to fit a wide range of headsizes
  • CUSTOMIZABLE SENSOR LOCATIONS (contact us for custom requests)

* The DSI-7 replaces the DSI-6 prototype system (most information about DSI-6 and tutorial videos are applicable to DSI-7)

DSI-7 Donning

DSI: Set-Up

Doffing DSI-7

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DSI-Streamer Software

DSI-Streamer is Wearable Sensing's easy-to-use data acquisition software. The software features include:

  • Control of DSI headset functions
  • Real-time diplay and replay of data
  • Tabbed navigation of controls
  • Integrated diagnostic tab with graphical color representation of electrode impedance
  • User selectable filters
  • Record raw and/or filtered data
  • Exporting to standard EDF and comma-separated value (.csv) formats that can be readily imported to 3rd party applications
  • Editable montages, color scheme and display parameters (window size, scaling, etc.)
  • Event Related Potentials (ERP) view (in beta)
  • TCP/IP socket for real-time streaming to external applications (in beta)

DSI-24 vs DSI-7


Sensor Locations 20 sensors at International 10/20 System locations:
Fp1, Fp2, Fz, F3, F4, F7, F8, Cz, C3, C4, T3, T4, T5, T6, P3, P4, O1, O2, A1 and A2
7 sensors at the following International 10/20 System locations:
F3, F4, C3, C4, Pz, P3, P4
+ Linked Ear channel (2 earclip sensors)
(Ask us about custom locations)


Common Mode Follower sensor at Pz Common Mode Follower Sensor at Pz
Ground One (1) ground electrode at Fpz One (1) ground electrode at Fz
Headset Ideal for long-term ambulatory use in office or laboratory environment

Ideal for ultra-rapid use in office or laboratory environment.

  • Freedom 7D EEG headset
  • DSI-Streamer Software
  • BrainAvatar software



Sensor Locations Seven (7) sensors at fixed locations of theInternational 10/20 System locations:
F3, F4, Cz, C3, C4, Pz, P3, P4 + Linked Ears


One (1) Common Mode Follower Sensor at Pz is default reference (can be changed to LE in software)
Ground One (1) ground electrode at the last remaining location

Easy to don, comfortable, and long-term wearable headset assembly with spring-loaded arms and pods for sensor support.
Good for easy rapid use in office or laboratory environment.


One (1) 7-channel amplifier and digitizer
Wireless BlueTooth
Run-time >12 hours
Headsize fit 52-62cm circumference
Headset weight ~350g
Wireless range: 10m
Digital Inputs: 4 bit input
Analog/Digital Converter: 16 bits
Analog/Digital resolution: 0.317 uV referred to input
Sample Rate: 300 Hz
Bandwidth: 0.003-150Hz
Gain: 60
Common mode rejection ratio: > 120dB
Channel Cross-talk: < -70dB with sensors
Input Impedance (1Hz): 47Gohm
Input bias current: <25pA
DC offset tolerance: +/-200mV
Maximum input range: 10mV pk-pk
Noise (1-50Hz): <3 uV pk-pk