Yes, you can use WHILL devices if you have a pacemaker. However, when using the Model C2, those who have an implanted pacemaker, implanted defibrillator, or other electrical medical devices on their bodies must leave a minimum of 8 inches between themselves and the magnetic connectors.
The magnetic connectors are located at the connection between the seat assembly and rear drive base. The magnetism of the magnetic connectors may have an adverse effect on electrical medical devices.