... 1300, 1310, 1490, 1550nm wavelength testing. At the same time, TPM560C offers perfect testing functions and Product featuresThe most perfect testing ... -Wavelength recognition, no need for communication between the sources and power meter. Save test time and decreases the potential error.3. 21 ... .3. High quality and rugged design, ideal for field testing. TPM560C Advanced Optical Power Meter,Power Meter