1. **Accurate and Efficient:** This 3-in-1 power meter features a highly sensitive chip for fast and precise measurements, requiring no warm-up time – simply plug and play. 2. **Advanced Features:** This multi-functional tester offers features including relative power calculation, calibration, and an automatic shutoff function for added convenience. 3. **Wide Wavelength Coverage:** With a wavelength range of 850 to 1650 nm, this optical power meter meets most communication technology maintenance needs. 4. **Long Detection Distance:** Using a red light source, this optical power meter can detect faults up to 15 km away, making it highly effective for quick and efficient fault location. 5. **RJ45 Network Testing:** In addition to power testing, this device includes RJ45 network testing functionality for quick network cable troubleshooting. Specification: Item Type: Fiber Optic Power Meter Power Measurement Range: -70-+10dBm Red Light Source Detection Distance: 15km Power Supply: Requires 2 AAA batteries (not included) Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelengths (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear display: 0.1%, Logarithmic display: 0.01 dBm Operating Temperature: -10℃ to +60℃ Storage Temperature: -25℃ to +70℃ Auto-off Time: 10 minutes Battery Continuous Working Time: At least 40 hours Material: Plastic Color: Black + Red Packing List: 1 x Fiber Optic Power Meter 1 x Lanyard Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.