Item Type: Optical Power Meter Material: ABS Model: TL537C Power Measurement Range: -50 to +26dBm (at 1550nm) Standard Wavelength: 850, 1300, 1310, 1490, 1550, 1625 Interface Type: InGaAs Accuracy: ±0.35dB Operating Wavelength: 800-1700nm Continuous Working Time: 100 hours (standby time: approximately 230 hours) Power Supply: 2 x AAA battery (battery not included) 6 WAVELENGTHS: This optical power meter supports standard wavelengths of 850nm, 1300nm, 1310nm, 1490nm, 1550nm, and 1625nm, suitable for most fiber optic testing applications in communication engineering. UNIVERSAL INTERFACE: Compatible with FC, SC, and ST connectors. The device features an ergonomic design for comfortable handling. MULTI FUNCTIONS: Features include relative power measurement, calibration, auto range selection, and battery level indication, offering reliable performance for field use. SENSITIVE AND PRECISE: Equipped with a sensitive detection chip and stable internal structure for fast, accurate measurements. No warm-up required—ready to use upon power-on. LOW POWER CONSUMPTION: Designed for energy efficiency, supporting over 100 hours of continuous operation on standard batteries. Package Includes: 1 x Optical Power Meter 1 x Storage Bag 1 x User Manual