... operation! Optical Communication Engineering and maintenance, CATV fiber optic project and maintenance OBox RS6201 series Handheld ... points: 650nm,785nm,830nm,850nm,980nm,1310nm,1490nm,and 1550nm. RS6201 has large dynamic range makes ... features: High display resolution. Linear and logarithmic display. Absolute measurement and relative measurement. Compact design, portable , light weight. Long battery ...