Working with fiber optics? This handheld optical power meter is a seriously handy tool to have in your kit! It measures continuous optical power from -70 to +10 dBm with pretty solid accuracy (±5%). What's really cool is it tests 9 different wavelengths - 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, and 1625 nm - so it covers most applications you'll encounter. The universal interface works with FC, SC, and ST connectors without any adapters needed, which saves time and money. It's plug-and-play too - no annoying warm-up time waiting to get measurements. The built-in lithium battery lasts around 20 hours and charges via USB, so you can use a power bank, computer, or car charger. It's lightweight and portable with a hanging rope, making it easy to carry around job sites. The display shows both linear (0.1%) and logarithmic (0.01dBm) readings, and it has useful features like auto-shutdown, memory wavelength, and user calibration. The detector is built-in and well-protected, so it won't get damaged easily. Comes with a 2-year warranty and solid customer support. Definitely a professional-grade tool at a very reasonable price!