The Silicon ZOOM II / Dual OWL 850 Test Kit is ideal for LAN managers and installers who need to do simple attenuation tests on their multimode networks. The Silicon ZOOM II (Zeroed Output Optical Meter) is an economical fiber optic power meter designed to provide accurate testing of multimode fiber cables at 850nm wavelength. The 4-digit 7-segment LCD display shows power readings with a resolution of 0.01dB, power units in dBm, dB, or uW, and battery power level. The Silicon ZOOM II comes configured with a 2.5mm universal port for connection to SC, ST, and other connector types that have a 2.5mm ferrule. The Dual OWL 850 is an 850nm NIST traceable multimode light source. Its 850nm output is temperature-stabilized for accurate measurements. The Dual OWL 850 has two connector options: STor SC.