The THETA 4-channel stimulator by Chattanooga is designed to manage pain, neuromuscular stimulation, and specific rehabilitation protocols that require controlled voluntary muscle contractions. It includes programs tailored to neurological disorders such as spasticity, foot dorsiflexion in hemiplegic patients, and specific post-ACL reconstruction stimulation protocols.
The device offers a wide range of programs, including: Rehabilitation I & II, Pain Relief I & II, Vascular, Physical Preparation I & II, Neurology.
It is also equipped with a vascular function to improve blood circulation.

Treated conditions include:
  
Hemiplegia
  
Paraplegia/tetraplegia
  
Multiple sclerosis
  
Chronic obstructive pulmonary disease (COPD)
  
Tendon rupture (wrist/hand)
  
Carpal tunnel syndrome
  
Shoulder instability
  
Frozen shoulder (adhesive capsulitis)
  
Shoulder dislocation
  
Post-surgical care (Bankart/Latarjet procedures)
  
ACL rupture
  
Tendinopathies (Achilles, patellar, IT band, etc.)
  
Sprains (ankle, knee, etc.)
  
Epicondylitis
  
Shin splints (periostitis)
  
Muscle tears
  
Back pain (dorsalgia)
  
Total knee and/or hip prosthesis