A tree stand table device provides a table surface proximate a tree stand. A method using the system may comprise determining EMG data for a patient using the EMG sensor device. N boost units are connected in series between the power supply and the LED light bar, and the N boost units are connected in parallel with each other. The grooves provide a slight overlap with the wafer to facilitate the free exchange of gases beneath the wafer necessary for wafer loading and unloading operations.