... 1310nm,1490nm,1550nm,1625nmModel:B: Measurement range: -50~+26dBm,calibrated wavelength:850nm,1300nm,1310nm,1490nm,1550nm,1625nm ... calibration functionSpecifications: Measurement range dBm-70~+10 dBm-50~+26 dBmWavelength range(nm)800~1650Calibrated wavelength850nm,1300nm,1310nm ... batteriesDC power supplyOptional accessory which require special orderSupport wide range power input work (AC 90-240)Working ...