We are offering portable cable fault locator. Technical specifications operating time : 8 hrs continous without backlight maximum range : for open and short faults:5 kms display : 240 * 128 dot matrix liquid crystal accuracy : for open and short faults : +- 1 % serial port : rs-232 charging source : 15 v 1 amp external adaptor battery : 12 v ni-mh rechargable battery applications measure open and short faults measure low insulation faults