Welcome to the store! 1. High-precision optical power, selectable kilometers, strong light source, convenient and practical. 2. Made with high-quality materials, it's robust, durable, and boasts a long lifespan. 3. Features 7 types of test wavelengths, an automatic shutdown function, and a battery life of at least 40 hours. 4. Equipped with an interchangeable interface, this optical power meter is easy to use. 5. This fiber optic tester offers stable performance and accurate testing, with a measurement range of -70~+10dBm. Item Type: Optical Power Meter Model: DXP-50D Material: ABS Battery: 2 x 1.5V AA batteries (batteries not included) Purpose: Optical fiber communication Power Measurement Range: -70~+10dBm Probe Range: InGaAs Wavelength Range: 800-1700nm Standard Wavelength (nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Display Resolution: Linear display: 0.1% Logarithmic display: 0.01dBm Operating Temperature (°C): -10~+60°C Storage Temperature (°C): -25~+70°C Automatic Shutdown Time (min): 10 minutes Continuous Battery Life: No less than 40 hours Package Includes: 1 x Optical Power Meter (battery not included) 1 x Adapter 1 x Manual Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately, and we will provide you with the best solution!