Welcome to our store! 6 WAVELENGTHS: This optical power meter can test standard wavelengths of 850nm, 1300nm, 1310nm, 1490nm, 1550nm, and 1625nm, covering most communication technology maintenance requirements. UNIVERSAL INTERFACE: The universal optical interface supports FC, SC, and ST adapters. The body is ergonomically designed for a comfortable grip. MULTIFUNCTIONS: The meter includes functions like relative power calculation, calibration, automatic range conversion, and battery power display, making it highly practical. SENSITIVE AND ACCURATE: Featuring a sensitive chip and a robust internal structure, measurements are fast and precise, requiring no warm-up time – just plug and play. LOW POWER CONSUMPTION: The meter has low battery consumption and supports over 100 hours of continuous operation. 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±10nw Applicable Wavelength: 800-1700nm Continuous Working Time: 100h (Standby Time: approx. 230h) Power Supply: 2 x AAA batteries (batteries not included) Package Includes: 1 x Optical Power Meter 1 x Storage Bag 1 x Manual Customers are our top priority. If you encounter any issues with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We are committed to providing you with the best after-sales service.