- The OTDR30A is a single mode OTDR that can test fiber optic cables up to 300 meters with a loss measurement accuracy of +/-0.3dB. - It has an LCD display, RS-232 and USB ports, and can test at wavelengths of 1310nm and 1550nm. - Key features include testing single mode fiber with various pulse widths and fiber connector types like FC, SC, and ST. It allows uploading test curves and has a rechargeable battery.