This study looks at whether a device called transcranial direct current stimulation (tDCS) is safe and easy to use at home for people with Parkinson's Disease, a condition that affects movement and gets worse over time. Participants, aged 40 to 70, will learn how to use the tDCS device during an in-person visit. Then, they'll use the device at home for 20 minutes every day for a week. On the second and third days, there will be video calls for support. After each session, they will fill out online surveys about any side effects and how easy the device was to use. The study will also see if using tDCS helps improve movement problems.

• Participants need to attend one in-person training session and two video calls on days 2 and 3.
• The study lasts for 7 days, with daily 20-minute sessions.
• Participants must have a computer for video calls and surveys.