Welcome to our store! 1. MEASUREMENT RANGE: Multifunctional optical power meter with a measurement range of -70~+10dbm, fast and accurate operation, no need to wait for warming up. 2. EXCELLENT PERFORMANCE: Fiber tester uses a sensitive chip with relative power calculation and calibration functions, stable and reliable performance. 3. 10 WAVELENGTHS: Supports 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm standard wavelengths, multiple data storage sets, store and view anytime. 4. PORTABLE DESIGN: Compact handheld design with a durable ABS plastic casing, lightweight and robust. 5. MULTIPLE FEATURES: Integrated network testing, optical power meter, red light source, and LED light, covering most needs of communication maintenance. Product Type: Optical Power Meter Model: AUA M70 Material: ABS Power Supply: 2 x AAA batteries (batteries not included) Measurement Range: -70~+10dbm Wavelength Range: 850-1700nm Standard Wavelengths (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear display: 0.1%, logarithmic display: 0.01dBm Operating Temperature: -10~60℃ Storage Temperature: -25~70℃ Auto Shut-off Time: 10 minutes Battery Continuous Working Time: No less than 40 hours