operating mode for users to free choice, separate choice switch operation status and operation mode;

Stall a: 2 minutes is to stop six minutes, the cycle;
Stall two: Reverse 2 minutes, stopping six minutes, the cycle;
Stall three: stop is two minutes to six minutes, two minutes suspended inverted six minutes, the cycle;
Stall four: five minutes is transferred, reverse 5-minute 3-hour, nine hours to stop, cycle