The Optical Wavelength F7BMS Fiber OWL 7 BIDI is a high-accuracy, high-resolution, microprocessor-controlled optical loss test sets (OLTS) capable of performing a wide variety of testing applications, from basic optical loss measurement up to simultaneous bi-directional, dualwavelength fiber link certification. With a wide measurement range and NIST-traceable wavelengths, the Fiber OWL 7 BIDI is ideal for both singlemode and multimode fiber link certification. Enclosed in an attractive hand-held case made from high impact plastic and protected by a protective rubber boot, test readings and graphical help screens can be viewed on the color LCD, and an intuitive 10-key keypad allows for easy data entry. Each Fiber OWL 7 BIDI is powered by re-chargeable lithium polymer batteries, typically allowing up to 50 hours of continuous use. A built-in auto-shutdown feature further conserves battery life. Batteries are re-charged through the USB port via supplied battery chargers.