PR-745 feature to the SpectraScan line—variable spectral bandwidth. Most self-scanning spectroradiometers feature a single system bandwidth. The Variable Bandwidth option provides three bandwidths that can be selected from the instrument menu or from a PC using Remote Mode Commands or SpectraWin 2 software. Bandwidth sizes include 2, 4 and 8 nm for the PR-740 or 4, 8 and 14 nm for the PR-745. This option is especially useful when it is necessary to resolve the spectral profile of narrow band sources with more precision (using a smaller bandwidth) or get more throughput for broadband sources (using a larger bandwidth) without changing instruments.The high-resolution, full color touch screen display provides both an easy means of negotiating through instrument setup menus and of viewing measured results, including a full-color Spectral Power Distribution (SPD) graph of the measured sample.With the Bluetooth option, the instrument will communicate for up to 100 feet (30.5 m) away from the base .745 introduces a new feature to the SpectraScan line - variable spectral bandwidth.745 provides unsurpassed flexibility with the world's largest selection of optical accessories.