Specifications

1. simple operation
2. Fine quality and reasonable price

all 4-stages has separate control button.

Stage-1 2 3 are temperature control, Stage-4 is time control.

Stage-1 2 3 could set different temperature.

When inner temperature below the minimum setting index, three groups of fans under stage-1 2 3 temperature control will not work. No.4 group will start on or stop by stage-4 time control.

When iner temperature increased, three groups of fans will run as per temperature setting, meanwhile No.4 group fans will stop.

Finaly when higher temperature,Down temperature accurately; When low temperature, ventilation come true..