May 2003
 Launched HI-300 development project

Oct 2004
 HI-300 Published in Market

Feb 2005
 Launched HI-2600 development project

Oct 2005
 HI-350 Published in Market
 Upgraded from HI-300
 Primary upgrade : Change Single Color LCD Screen to colorful

Oct 2006
 HI-2600 Published in Market

May 2009
 Launched HI-2800 development project

July 2010
 HI-300 HI-350 Stop Production

July 2010
 HI-2600S Published in Market
 Upgraded from HI-2600
     (Since Sep 2010,all 2600 from our company are 2600S.At our product specification, model number had not
     been changed.But all HI-2600 is HI-2600S)
 Primary upgrade : Change LCD Screen to the one can be read under sunlight

May 2011
 HI-2800 Published in Market

Nov. 2011

     Change the Module number from HI-2600 & HI-2800 to HY2600 & HY2800