Features: _x000D_ 1. This is an optic power meter designed for professionals to maintain the fiber optic network. _x000D_ 2. Compact, lightweight, universal optic interface design,easy to carry and operate. _x000D_ 3. LCD display with backlight, it is easy to read value. _x000D_ 4. More advantage:auto power off(selection),battery volume display, absolute/relative value switchable. _x000D_ 5. Ergonomic design, easy and fast for user to use with simple key operation mode and comfortable hand feeling. _x000D_ 6. Widely used in optic fiber engineering,optic fiber sensor research,optic elements production,optic elements research etc. _x000D_ _x000D_ Specification: _x000D_ Condition: 100% Brand New _x000D_ Model:WT65 _x000D_ Color:Black _x000D_ Measuring range: -70dBm-+6dBm. _x000D_ Wave length: 850nm,1300nm,1310nm,1490nm,1550nm,1625nm. _x000D_ Resolution: 0.05. _x000D_ Accuracy: -48dBm:+-2dBm; -48dBm6dBm,+-3.5dBm. _x000D_ Operation Environment(>-48dBm): 0-40(32-104) 5-95%RH. _x000D_ Operation Environment(:0-32(32-89.6) 5-80%RH _x000D_ Storage Environment: temperature:0-40(32-104) 5-95%RH _x000D_ Power Supply: 2 x 1.5V AAA Batteries(not included) _x000D_ Auto Power Off: 10min _x000D_ LCD Backlight: Yes _x000D_ Battery Volume Display: Yes _x000D_ Absolute/Relative Value Switchable:Yes _x000D_ Weight: Approx. 83g / 2.9oz _x000D_ Size: Approx. 120 * 33 * 18 / 4.7 * 1.3 * 0.7in _x000D_ _x000D_ Package List: _x000D_ 1 * Network Cable Tester