Feature: 1. Plug and Play: This mini optical fiber meter can be fast and accurate. No need to wait for warm up, plug and play. 2. 10 Wavelengths and Light Sources: The wavelengths are 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 and for SC, for FC, for ST adapters. 3. Calibration Function: Our fiber optic meter measures at 70 to +10dbm, can do relative power calculations, and has a calibration function. 4. Sensitive Chip: Our mini optical fiber power meter has a sensitive chip and a rugged internal construction. Low battery consumption, 40 hours of continuous operation 5. Application Scenarios: This mini optical fiber meter can cover most of the needs of communication engineering maintenance. Lightweight, easy to carry and use. Specification: Item Type: Mini Fiber Optic Power Meter Model: AUA D7 Material: ABS Probe Type: InGaAs Wavelength Range: 850 to 1650nm Standard Wavelength(nm): 850,980,1270,1300,1310,1490,1550,1577,1625,1650 Auto Shutdown Time: 10 minutes Power Measurement Range: -70 to +10dBm Power Supply: AAA batteries required x 2 (shipping without batteries). Package List: 1 x Mini Fiber Power Meter(Shipping Without Batteries)1 x User Manual1 x Lanyard