Feature: 1. Highaccuracy optical power, optional kilometers, strong light source, convenient and practical. 2. Using highquality materials, it is sturdy and durable and has a long service life. 3. 7 kinds of test wavelengths, automatic shutdown function, battery continuous working time is not less than 40 hours. 4. Equipped with replaceable interface, the optical power meter is simple to operate. 5. Optical fiber tester has stable performance and accurate testing, and measurement range can be 70~+10dbm. Specification: Item Type: Optical Power Meter Model: DXP-50DMaterial: ABS Battery: 2 x 1.5V AA battery(battery not included) Purpose: Optical Fiber Communication Power Measurement Range -70~+10dbm Probe Range InGaAs Wavelength Range 800-1700nm Standard Wavelength (nm) 850, 980, 1300, 1310, 1490, 1550, 1625 Display Resolution Linear display: 0.1% logarithmic display: 0.01dBm Working Temperature () -10~+60 Storage Temperature () -25~+70 Automatic Shutdown Time (min) 10 minutes Battery Continuous Working Time Not less than 40 hours . Package List: 1 x Optical Power Meter (Battery Not Included)1 x Adapter 1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.