The TW3205A from Techwin is an InGaAs Optical Power Meter that operates at a wavelength from 800 to 1700 nm. It can measure optical power in both dBm and mW in the range of -60 to +3 dBm and has a resolution of 0.01 dB. This optical power meter has 850, 980, 1310 and 1550 nm calibrated wavelengths and has a 10 minute auto-off function to conserve power. It is powered by alkaline batteries and can function for 360 hours with three 1.5 V batteries. This optical power meter is available as a lightweight and compact package that measures 115 x 60 x 20 mm and has FC (interchangeable SC, ST) as well as 2.5 mm universal optical connectors. It is ideal for maintenance in telecom, maintenance CATV, test lab of optical fibers, and other fiber optic measurement applications.