1. Large display screen of the controller to show time in hours and minutes and temperature in centigrade or fahrenheit according to the customer's preference 2. Presetting working and waiting time have a and b model. Under a model, user can set working time from 30 minutes to 8 hours or no time limited. Under b model, user can set waiting time from 0 to 12 hours. When the time count down to zero, it will switch to a model automatically and works as the setting under a model. 3. Sequential heating to begin with all of the elements switch on for rapid heating, as the required temperature is approached the elements switch off sequentially until just one element is left on in order to maintain the cabin temperature steady helping to improve user comfort and extend the life of the elements as well as saving energy. 4. Double safety protection cut-off for both sauna room and sauna heater as achieving a high temperature. 5. Door interlock is a new eu standard for ensuring safety .If the sauna cabin door is opened, the timing will stop and the sauna heater will not restart again until it is reset. 6. Diagnostics - 8 leds on the controller show different working stages and operations that can be used for elementary diagnosis if a problem should occur. 7. Control panel + control box, high voltage and low voltage are separately. Every oceanic sauna heater is subjected to 5 strictly controlled tests: 1.48 hour continual test for circuit board 2. Controller is tested for all functions 3. High voltage test 4. Earthing resistance test 5. Operational test of every sauna heater before packing Ocs-b series sauna heater are guaranted for 1 year from the date of purchase.