Main box contains 5 buttons and 4 display panels 5 buttons: Mode select Time up Time down Start or stop On or off 4 panels: Mode (4 modes for selection) Work pressure (voltage) Work electricity (ampere) Time (treatment time in minutes) Operation procedures: Insert power cord and array into corresponding jacks in chassis Place array into basin filled with water and then turn power on and press on/off button Time and work pressure will show accumulative treatment time used Work pressure indicates number of hours Time indicates number of minutes used Total amount of time used is up to 60 minutes There will be an increase in one hour shown in work pressure panel Example: If total accumulative time used is one hour twenty minutes work pressure panel and the time panel will display number 002 and 20 respectively When accumulative time showing step is completed the whole device will be back to steady state of operation Time shows at 30 minutes Predetermined treatment time Mode shows at 1, that is mode number 1 and predetermined treatment mode There are 4 modes for selection with mode number 4 is strongest and number 1 is weakest among 4 modes Work pressure shows word off Work electricity shows at 0.00