Fluke Networks FTK2000 Single Mode Fibre Optic Test Kit, Wavelengths: 1310 nm, 1550 nm, Resolution: 0.01 dB, Interface Type: USB, Maximum Power Measurement: +10dBm, Battery Type: AA, Battery Life: 50 h, Includes: 1310 & 1550 Source, Case, Power Meter, Height: 165mm, Length: 80mm, Maximum Operating Temperature: +50°C, Minimum Operating Temperature: -10°C, Minimum Output Power: -7dBm