... .Low battery alarm 3. Auto-off function OPTICAL FIBER RANGER SF2011 Company Introduction:JINSAIXUN (TIANJIN) ELECTRONICS TECHNOLOGY CO.,LTD ... Jinsaixun(tianjin) Electronics Technology CO.,LTD is a high-tech enterprise which specializes in designing, manufacturing and selling TV ... products and our best service.Description:SF2011 optical fiber ranger is the most portable equipment for optical cable fault ...