Easy-to-install and full of programmable features, Spectra IV SE & SL Series Dome Positioning systems are the best selling domes in the world. The Spectra IV SE Series delivers unmatched video quality and performance. Available in either the 29x or 36x models, Spectra IV SE is specifically designed to meet the stringent video security requirements of city surveillance, industrial, marine, transportation, and casino applications. The Spectra IV SL series is an entry-level system designed for those applications that require good quality video and control but not all the features associated with the Spectra IV SE series. This model is available in all standard models, including in-ceiling, surface mount, pendant, environmental in-ceiling and environmental pendant.