1. Fibra Optica ORIENTEK T25M Optical Power Meter Price Features : Wave IDAutomatic Wavelength Identification and switching (when used with T15M handheld light source) Frequency ID/Tone detection---Automatic frequency identification Pocketsize, large easy to read LCD display, easy to use Long battery life with 2 x AAA alkaline Specifications Type Orientek T25M Wavelength 800 ~1700 nm Detector InGaAs Measurement Range -70~+3 dBm Uncertainty 5% (-10 dBm,203 grade) Calibrated Wavelength 850,980,1300,1310,1490,1550 nm Resolution 0.01 dBm Power Supply Alkaline Battery(3 AA 1.5V) Battery Operating Time 240 h Operating Temperatrue -10~+60 grade Storage Temperatrue -25~+70grade Relative Humidity 0~95% (non-condensing) Dimension 82mm(W)33 mm(D)175 mm(H) Weight 310 g 2.Orientek T15M Optical Light Source Specification: Type Orientek T15MS Wavelength(nm) 1310/1550nm Typical Output Power -5dBm Output Stability 0.05dB/15mins; 0.1dB/ 8hours Optical Connector SC+ 2.5mm universal Power Supply Alkaline Battery(2 AAA 1.5V batteries) Modulation Frequencies CW,270Hz,1KHz,2KHz Dimension(mm)/Weight(g) 130x65x35mm / 180g Standard accessories User Guide certificate of qualified FC connector SC connector Guarantee card Soft carry bag Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.