Feature: 1. Better Testing: This fiber optical power tester with -70~+10dbm wide testing range also has higher accuracy in measurement. 2. Reliable Using: With relative power calculation and calibration function as well as digital display, very easy to operate. 3. 10 Wavelength: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm and 1650 nm 10 kinds of wavelength. 4. Simple Working: Designed to have sturdy internal structure and sensitive chip, very quick in response, just plug and play. 5. Easy Carrying: Comes with a compact size and a light weight as well, both the storage and carrying are very convenient. Specification: Item Type: Optical Fiber Power Meter Model: AUA-MC70 Material: ABS Power Supply: 3.7v 650mah polymer battery, shipped with built in battery. Power Measurement Range: -70~+10dbm Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear Display: 0.1%; Logarithmic Display: 0.01dBm. Working Temperature: -10~+60℃ Storage Temperature: -25~+70℃ Automatic Shutdown Time: 10 Minutes Battery Continuous Working Time: No less than 40 hours. . Package List: 1 x Optical Fiber Power Meter 1 x User Manual1 x Lanyard1 x USB Charging Cable