A stalwart of Silicon Valley has revealed a new project designed to help people with Parkinson’s disease.

Microsoft unveiled a prototype smartwatch, dubbed Emma, which uses vibrations to help individuals with the disease control hand tremors.

Parkinson’s causes the brain to releases extra signals to muscles, creating an internal feedback loop that causes muscles to perform many movements at once, resulting in tremors. The Emma device is built with small coin cell motors that vibrate to distract the user’s brain from trying to create these tremors.

The idea is to have the device calm muscles movements and make it easier to perform simple tasks, according to Microsoft.

Microsoft Innovation Director Haiyan Zhang named the invention after her friend graphic designer Emma Lawton who was diagnosed with Parkinson’s disease in 2013. The disease ended up destroying her ability to perform simple tasks like drawing letters and lines.

One notable design aspect of this technology is that it allows the user to refine the pattern of vibrations in the watch. Lawton was able to use a specially designed app on a Windows 10 tablet to control vibration speed; she found that a rhythmic vibration was the most useful in helping with her symptoms.

Zhang recently presented her invention at the company’s annual BUILD conference, where developers from all over the world gather at Microsoft’s headquarters to check out the firm’s new products.

Zhang and her team plan on streamlining and optimizing the watch, working with a neuroscience team in London and setting up clinical trials.

You can watch a video of the demonstration below.