Features 1、3 in 1 Function: Combining the functions of optical power meter (OPM), visual fault locator (VFL), and LED light into a portable device, offering convenience and efficiency for fiber optic maintenance and troubleshooting 2、Working Range: Featuring 10 standard measurement wavelengths (850 980 1270 1300 1310 1490 1550 1577 1625 1650nm) and power test range of -70 to +10dbm, offering accurate measurements across diverse fiber optic system 3、High Accuracy: Boasting a optical power test error of less than 0.2dB, this optical tester guarantees accurate readings. Additionally, the users can perform self calibration for further data accuracy, ensuring long term reliability 4、Visual Fault Locator: The integrated VFL emits a powerful 650nm red light source with a testing distance up to 50mW, making it ideal for quickly identifying breaks, bends, or poor connections in fiber cables, enhancing overall security 5、Backlit Display and Battery Powered: Equipped with backlight screen for easy reading in dark environments, auto shutdown after 10 minutes of inactivity. Powered by 3.7V 650mAh rechargeable battery, with Type C interface charging Specification Item Type: Fiber Optic Tester Product Material: ABS Power Testing Range: -70-+10dbm Probe Type: For InGaAs Wavelength Range: 850-1650nm Testing Accuracy: ±0.2dB Standard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear Display: 0.1%, Logarithmic Display: 0.01dBm Working Temperature: -10-60℃ Storage Temperature: -25-70℃ Auto Power Off Time: 10 minutes Red Light Source Testing Distance: 50mW Output Wavelength: 650nm Product Size: Approx. 180 x 89 x 42mm / 7.1 x 3.5 x 1.7in Battery: 1 x 3.7V Rechargeable Battery 650mAh (Built in) Package List 1 x Optical Power Meter 1 x FC Adapter 1 x USB C Charging Cable 1 x User Manual