Study to Evaluate Safety and Efficacy of Peroneal Transcutaneous NeuroModulation in Subjects With Parkinson's Disease and Essential Tremor

Inclusion Criteria: * 18 years of age * Competent and willing to provide written, informed consent to participate in the study * Stable dose of any chronic medications, if applicable, for 30 days prior to study entry * Willing to comply with study protocol requirements * Subject agrees not to participate in another study from 30 days prior the screening visit until the final study visit * For subjects with PD: Bradykinesia in "on" period based on clinical assessment Rigidity in "on" period based on clinical assessment Hand/arm exhibiting tremor (resting and/or intentional and/or postural) ≥ grade 1 as assessed by the MDS-UPDRS tremor score in "on" period • For subjects with ET: Visible hand/arm and/or foot/leg tremor (resting and/or intentional and/or postural) ≥ grade 1 as assessed by the TETRAS Exclusion Criteria: * Implanted electrical medical device, such as a pacemaker, defibrillator, or deep brain stimulator * Suspected or diagnosed epilepsy or other seizure disorder * Severe degree of disability or dependence in daily activities \>grade 3 as measured by modified Rankin Scale (mRS) * Presence of clinical signs or diagnosis of dementia * Swollen, infected, inflamed areas, or skin eruptions, open wounds, or cancerous lesions of skin at stimulation site * Presence of clinical signs of peripheral neuropathy on lower limbs * Presence of chorea and/or dyskinesia * Clinical symptoms or diagnosis of major depressive disorder * Presence of any other neurodegenerative diseas…