ST800 Optical Power Meter, High-Precision Fiber Optic Power Tester, Handheld Optical Power Meter 

Wavelength Range: 800–1700

Photosensitive Material: InGaAs

Linear Display: 0.1%

Logarithmic Display: 0.01 dBm

Measurement Range: -70 to +3

Operating Temperature: -10 to +50 °C

Storage Temperature: -30 to +60°C

Uncertainty: ±5%

Batteries: 2 AA batteries

Weight: 210 g

Dimensions: 160 × 76 × 28 mm

Auto-off Time: 10 min