"Remote  control  Fangpusun PA RC100 remote control  allows to program Fangpusun solar charge controllers. The values can be  adjusted with the help of switches. After a restart of the charge controller  the new settings can be activated by pressing the program-button on the  Fangpusun PA RC100. An LED will transfer the values to the controller. " http://www.fangpusun.com/