All the LS models are convection cooled and do not need any external airflow. The height of the units range from 1.1" to 1.5" tall allowing them to be used in a 1U rack. Safety certifications have been obtained from UL and TUV allowing them to be used anywhere in the world. A CB certificate is available upon request. Operation up to 300VAC input is allowed for up to 5 seconds, providing additional reliability for countries where the AC line is not well regulated.