1、Accurate Measurement: The portable optical fiber power Meter uses InGaAs sensor technology to provide high accuracy in measuring optical power. 2、Wide Measurement Range: With a measurement range from ‑40dBm to +23dBm, this fiber optical power meter can handle a variety of power levels. 3、Isolation Function: The fiber optic tester offers excellent isolation for different bands, including &gt;40dB isolation for 1490nm, 1310nm, and 1550nm bands. 4、Filter Function: This optical power meter has a built in filter function with &gt;40dB isolation in the 1550nm band and &gt;30dB isolation in the 1310nm band. 5、Durable And Portable: This PON power meter is designed with a clear screen and a dustproof design, making it reliable in different working environments. Item Type: Fiber Optic Cable Tester Material: ABS Model: FHP2P01 Battery: AA Battery x 2 ( Shipped Without Battery ) Sensor Type: InGaAs Isolation: 1490nm band>40dB,1310nm band>40dB,1310nm band>40dB Filter Function: 1550nm band>40dB,1550nm band>30dB,1490nm band>30dB Measurement Range: -40-+16dBm, -50-+16dBm, -50-+23dBm Insertion Losses: <1.5dB Measurable Optical Bandwidth: 1260-1360nm, 1480-1500nm, 1539-1565nm Inherent Uncertainty: 0.5dB±1nW at 1550nm Display Resolution: 0.01dB Threshold Setting: 10 Groups, Set By Upper Computer Data Storage: 900 Items Operating Temperature: -10℃-+50℃ Communication Interface: USB Interface 1 x Optical Power Meter 1 x Storage Bag 1 x Charging Cable 1 x Manual 1 x Charging Head