Features ★ 7 Kinds of Test Wavelengths - Fiber Optic Cable Tester portable fiber optic power meter can test 850, 980, 1300, 1310, 1490, 1550, 1625nm ​Standard Wavelengths, and measurement range is ‑70~+10dbm,1mw red light source. ★ Versatile Fiber Cable Tester - Fiber Light Tester Equipped with replaceable interface, the optical power meter is simple to operate. With automatic shutdown function, battery continuous working time is not less than 40 hours. ★ Quick Response and Accurate Measurement - This Optical Power Meter fiber optic tester can display fast-tracking and real-time measurement of optical power when output power changes ★ High Precision Optical Power Meter - High‑accuracy optical power, optional kilometers, strong light source, convenient and practical.Using high‑quality materials, it is sturdy and durable and has a long service life. ★ Customer Service - We are committed to meeting customer demands to create the finest products. Any suggestions and request please feel free to contact us in anytime that we can try our utmost to reply in short time. Specification: Item Type: Optical Power Meter Model: DXP-50D Material: ABS Battery: 2 x 1.5V AA battery(battery not included) Fiber cable testerPower Measurement Range: -70~+10db 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. Package List 1 x Optical Power Meter (Battery Not Included) 1 x Adapter 1 x Manual