Features 6 WAVE LENGTHS This optical power meter can test standard wavelengths of 850nm, 1300nm, 1310nm, 1490nm, 1550nm and 1625nm, covering most communication technology maintenance requirements. Sensitive and precise: with sensitive chip and robust internal structure, the measurement is fast and accurate without waiting for preheating, plug and play. Multifunctional: the meter has the functions of relative power calculation, calibration, automatic range conversion, battery power display, etc., very practical. Low power consumption: the battery consumption is low and supports more than 100 hours of continuous operation. UNIVERSAL INTERFACE: Universal optical interface supports FC SC ST adapter. The body is ergonomically designed, very comfortable to handle. Specification: Item Type:Optical Power Meter Material: ABS Model: TL537C. Power measurement range: -50 to +26 dBm (at 1550 nm). Standard Wavelength: 850 1300 1310 1490 1550 1625 Interface type: InGaAs Accuracy: 0.35dB±10nw Operating Wavelength: 800-1700nm Continuous working time: 100 hours. (Standby time: approx. 230 hours). Power supply: 2 x AAA batteries (battery not included). Package list: 1 x optical power meter. 1 x storage bag. 1 x user manual (English language Package List 1 x Optical Power Meter 1 x Storage Bag 1 x Manual