OPTICAL FIBER RANGER SF2011 1. Portable, rugged, light in weight and easy to use 2.Low battery alarm 3. Auto-off function OPTICAL FIBER RANGER SF2011 Company Introduction:JINSAIXUN (TIANJIN) ELECTRONICS TECHNOLOGY CO.,LTD Established in 2000, Jinsaixun(tianjin) Electronics Technology CO.,LTD is a high-tech enterprise which specializes in designing, manufacturing and selling TV signal level meter ...