Features:

Multi-wavelength precise measurement
Absolute power measurement dBm or mW
Relative power measurement dB
Low voltage warning
Automatic power off for longer battery life
High contrast backlit display
Small size, simple operation

Specifications:

Wavelength : 1310nm & 1550nm
Power Range : -30 ~ +25dBm
Accuracy : +-5%
Detector type : InGaAs
Connectors : FC / ST / SC
Operating temp : 0 ~ 40ºC
Battery : 9V DC