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Cala Trio medical device shown at angle

Cala TrioTM

is proud to help veterans with essential tremor.

Meet Cala Trio

The first wearable device designed from the ground up treat essential tremor (ET). The therapy delivers meaningful results for the majority of patients after just a single session.

Cala Trio maybe available for eligible veterans with essential tremor, and requires a prescription from your VA health provider.

How it works

Surface stimulation delivered at your wrist is thought to disrupt the central tremor network in your brain that causes the hand tremor.

  • Developed through Clinical Studies
  • 64% of patients reported having persistent relief for an average of 94 minutes1
  • 54% of patients' tremor power improved by at least 50%1
  1. The stimulation interrupts the tremor in the ventral intermediate nucleus of the thalamus part of the brain
  2. Gentle stimulation is sent to the median and radial nerves, traveling to the brain
  3. Cala Trio measures your specific tremor

A new approach to managing essential tremor


Cala Trio is a wrist worn wearable therapy. No surgery or invasive procedures needed.

Drug Free

Unlike pharmaceutical treatments for essential tremor, Cala Trio does not have any permanent or systemic side effects.

Easy to Try

There is no perfect treatment for everyone. If Cala Trio is not right for you, simply return within 90 days to your VA Prosthetics Department.


The image below is an actual patient test (Archimedes Spiral Task) before and after a 40-minute stimulation therapy with Cala Trio.

2 Lin PT, Ross EK, Chidester P, et al. Noninvasive neuromodulation in essential tremor demonstrates relief in a sham-controlled pilot trial. Mov Disord. 2018;33(7):1182-1183. doi: 10.1002/mds.27350.

Patient stories


“Using the Cala Trio changed my personality and my life. It made me more confident. It allows me to be free and I’m not feeling like people are looking at me.”



“I noticed how easy it was to eat I texted my wife to tell her what my experience was. When I was texting I thought how easy it is to text ... After I texted her that, I still remember, I held up my hand, I thought so this is what it feels like to feel normal.”



“I would always start my therapy with the Cala Trio in the morning when I first woke up. I would get my kids off to school so I prepare lunches and everything while using it ... all those day-to-day tasks that I struggled with I was able to complete thanks to the Cala Trio.”


Find out if Cala Trio is right for you

Take a brief quiz to see Cala Trio is right for you and receive a free doctor discussion guide.

Indications for Use

Cala Trio is indicated to aid in the transient relief of hand tremors in the treated hand following stimulation in adults with essential tremor. Please refer to the Safety Information for a complete listing of warnings and cautions.

Caution: Federal law restricts this device to sale by or on the order of a physician.

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1 Isaacson SH, et al. Tremor and Other Hyperkinetic Movements. 2020;10:29. DOI: