Fourier ExoMotus M4

Quote onlySold to clinics through Fourier Rehab and regional distributors on quotation, with no published price.

AvailableApp-adjustedHips & kneesWheeled support frame100 kg patient limitClinic only

Weeks+Ordered by hospitals and rehab centers through Fourier Rehab in China or regional distributors such as HealthLink (Hong Kong). Not sold to individuals. HealthLink listing ↗

Control: Therapist interface on the device only. No consumer app.

Distributor page (HealthLink) ↗Exoskeleton Report ↗

Overview

The ExoMotus M4 is Fourier's answer to the balance problem that makes most gait exoskeletons need crutches. It couples a hip-and-knee exoskeleton to a wheeled balance-support frame with a built-in seat, so a patient can be strapped in from sitting, stand up and walk inside the frame with a therapist alongside. It is the successor to the crutch-based Fourier X2 (ExoMotus X2), fits patients of 150–190 cm up to 100 kg and is aimed at clinic gait retraining after stroke, spinal cord injury and similar conditions, with use as a research platform too. Fourier, the Shanghai company better known today for the GR-1 humanoid, split its medical line into a separate Fourier Rehab arm in July 2024 and its own site now shows only the humanoids, so the M4 is documented mainly through distributors such as HealthLink in Hong Kong. Release year about 2023 (unconfirmed), NMPA and CE status (unconfirmed), and weight, battery and speed are not published.

Specifications

Category	Exoskeletons & exosuits · Medical & rehabilitation
Released	2023
Country	China
Availability	Available
Programmability	No SDK, app / visual programming only
Built-in autonomy	Reactive · Responds to its surroundings without a map, such as avoiding obstacles or following a person
LLM support	None · No voice assistant or LLM.
Best for	Ages 18+ (estimated)
Vision sensors	No vision sensors
Actuators	Brushless / direct-drive motors
Audio	No audio
Compute type	Proprietary / undisclosed
Control	App-adjusted
Weight	Not published (the exoskeleton docks to a wheeled frame measuring about 84 × 112 × 150 cm)
Assistance	Powered hips and knees move the legs through a customizable gait while a wheeled body-weight-support frame with a seat and handlebars carries the patient's balance, so people with lower-limb impairment can practice standing, walking and sit-to-stand on level floors and gentle slopes.
Joints	Hips & knees
Battery & runtime	Not published.
Operation	A therapist sets gait parameters, step length and assist levels on the device's user interface, and the patient holds the frame's handlebars.
Sensors	Multi-dimensional force sensors and joint sensors
Compute	Not published
SDK	None