Development History:

1st Generation: Outdoor one for multiple in-line type.

---> Advantages: Solve the soot problem in workshop

---> Disadvantages: Serious environmental pollution

2nd Generation: Smoke Absorber since 2000.

---> Advantages: Easy to move, easy to operate

---> Disadvantages: No purification effect

3nd Generation: Smoke Absorber pen since 2005.

---> Advantages: simple purification function, easy to move

---> Disadvantages: small capacity, not easy to replace and maintain

4th Generation: Indoor one for multiple purification 2012.

---> Advantages: easy maintenance

---> Disadvantages: highly energy-wasting, not easy to move

5th Generation: PWM control purification since 2013

---> Advantages: Low Energy consumption, easy to move

---> Disadvantages: No alarm function for filter

6th Generation: Remote-control purification since 2015

---> Advantages: alarm function for filter

---> Disadvantages: filter replacement cumbersome, poor smoking effect

7th Generation: Constant airflow & quick-opening type

---> Advantages: Constant airflow technology & The quick-opening & cabinet design filter structure.

---> Disadvantages: Not found yet.