HeadX Duo support

Magenta HeadX Duo in an open protective case.

What comes with Duo

  • HeadX Duo unit with crosshair laser and movement sensor
  • Adjustable head strap
  • Shock-resistant storage box
  • USB-C charging cable
  • Tilt-adjustment tool

Wallchart and exercise booklet additions depend on your selected package. Third-party wrist, chest and limb mounts are sold separately.

Charge with the supplied USB-C cable and a 5 V power source, following the supplied charging instructions. Contact support@headx.co.uk if anything is missing or damaged.

Choose your setup

The mounting position follows the body area you want to assess. The head strap is included; third-party wrist, chest and limb mounts are sold separately.

Head strap · neck

Use the supplied adjustable head strap for neck Range of Motion, Joint Position Sense, and Stability and Control. The head-strap fitting steps are below.

Explore assessments

Chest mount · trunk

A compatible chest mount carries Duo for trunk Range of Motion, with beta Joint Position Sense and Stability and Control assessments. The GoPro Chesty is a mounting option, sold separately.

Explore assessments

Thigh strap · hip

Duo is fitted to the thigh for hip Range of Motion. Select the side and movement pair in the app. A suitable third-party strap and mount are sold separately.

Explore assessments

Lower-leg strap · knee

Duo is fitted near the ankle on the lower leg for knee flexion and extension. This is a knee assessment, not an ankle-joint assessment. A suitable third-party strap and mount are sold separately.

Explore assessments

Duo connects to compatible action-camera mounts through its rear hinge and long fixing screw. Select the body area and assessment in the app, then set the reference position for the task. Keep the placement consistent when repeating an assessment.

Ask us about the mount for your setup. We reply within 1 working day.

Choose an assessment

Range of Motion is available for the neck, shoulder, elbow, trunk, hip and knee. Joint Position Sense and Stability and Control are available for the neck, with beta assessments for the shoulder and trunk.

Beta assessments are available to use while we continue to refine them. The Assessment Explorer shows the movements and results for each body area.

Range of Motion

Setup: Select the body area and side where relevant. Fit Duo in the matching position and set the starting reference.

Record: Record the selected movements and review the angles for each direction.

What the result means: For limb assessments, Duo records the angle of the body segment carrying the sensor relative to the starting reference. It does not measure an anatomical joint angle between two separately tracked segments.

Repeat: Keep the mounting position, reference and task the same. If a result looks unexpected, check the fit and reference before repeating it.

Joint Position Sense

Setup: Set a reference position. Move away, then return towards it using the chosen task.

Record: Record repeated attempts manually or automatically, according to the app mode.

Results: The result shows the angular difference for each return, with mean and peak error by direction. Smaller values mean a smaller recorded difference from the reference. The circles and colours help you read the result; they are not a universal normal/abnormal cutoff.

Save: Review the assessment alongside other sessions using the same setup and protocol.

Stability and Control

Setup and recording: Set the task reference and record a timed hold or controlled movement.

Results: Review the heat map, movement around the reference, and time within the selected angular target. Results include angular deviation and movement-path measures.

Interpretation: These results describe the recorded task. The angular path area is not the same as pressure-platform sway area.

Fitting and device controls

Person wearing a Midnight Blue HeadX Duo, side view.

Fitting the head strap

Place the strap around the head, with the laser at the front and the elastic adjustment at the back.

  1. Loosen the rear elastic cord fully.
  2. Place Duo on the patient's head with the laser facing forward at about mid-forehead level. The charging port and button should point upwards.
  3. Tighten the rear cord until Duo is secure and comfortable, without pressure points or slipping.
  4. Centre the device and check that no hair is caught under the strap.
  5. Turn on the laser and check that the crosshair is clear on the target. If the beam is angled or displaced, reposition Duo and check again.

Important: Power on Duo and confirm the app connection before fitting it to the patient.

Front pencil-style illustration of the HeadX Duo headband with laser illuminated.

Powering On, Off, and Laser Control

The Duo has a single green function button on the front of the device. Pressing it cycles through the following states:

  1. Off
  2. Laser on — Bluetooth connectivity available
  3. Laser off — Bluetooth connectivity available
  4. Off

To power on, press the button once. To switch to laser-off/Bluetooth-only mode, press again. Press once more to power off.

Three-quarter pencil-style illustration of the HeadX Duo headband.

LED Status Indicator

The LED on the top of the device indicates the current device state

  • Blue : Device on, Bluetooth available
  • Red : Low battery
  • Green/Yellow flashing : Battery charging
  • Green : Battery fully charged
  • White : Firmware updating
  • Purple : Calibrating

Software & App Support

Download on the App Store Get it on Google Play

App and compatibility

The HeadX Duo app is available for iOS, Android and Windows. The store listings give current device compatibility and release details.

  • Connect Duo over Bluetooth
  • Choose the body area and assessment
  • Record and review movement results
  • Save assessments on your device
  • Share a PDF report or export CSV data

Limb Range of Motion requires Duo firmware 3.2.11 or later. The app shows the connected device version and provides the update route.

Range of Motion covers all six body areas. Joint Position Sense and Stability and Control cover the neck, with beta assessments for the shoulder and trunk.

Connecting to the Duo

Power on the Duo and open the HeadX app with Bluetooth enabled. On the app homepage, select the HeadX Duo device from the dropdown, then select the specific HeadX Duo unit you wish to connect to. Once connected, follow the in-app prompts to begin a session.

If the device does not appear, ensure Bluetooth is enabled and the Duo is powered on and within range (approximately 10 metres, unobstructed).

Save, review and share

Save an assessment on your device, review it in the history, or group assessments into an appointment. You can add a name or reference to organise the record in line with your organisation's data-handling requirements.

Open a saved result to share a PDF report or export CSV data. Keep the body area, mounting position and task details with the record so repeat sessions can be compared on the same basis.

Where results are stored

Assessment records are stored locally on the device running the app. HeadX does not receive or manage those records.

You choose when to export, share or back up your files. Follow your organisation's arrangements for device security, access and record retention.

Firmware Update

HeadX app firmware-update screen with download and manual-update options.

Preparation

  • Power: Ensure the Duo is charged. If the LED is red, charge it first to avoid update failure.
  • Connection: Power on the device, connect it to the HeadX app, and keep it near your phone or tablet.

Update process

  • Go to Device Settings > Update Firmware in the app.
  • Review the details and tap Download & Install.
  • During the update: The LED will turn white. Do not power off the device, press the function button, or disconnect Bluetooth.

Completion

  • The update takes a few minutes, after which the Duo will automatically restart.
  • The LED will return to blue when ready.
  • Support: If the device fails to restart or the LED stays white, contact support@headx.co.uk.

Tip: Check the app for firmware updates.

Product documents