Several factors determine whether manual or electric operation is best for external venetian blinds and they typically vary from person to person and depending on the field of application. Manual operation: external venetian blinds can be manually operated using an operating element like a crank. This type of operation is generally more cost effective than electric operation and doesn't require a power supply. Electric operation: alternatively, external venetian blinds can be electrically operated by an electric drive controlled using a remote control, a push button, via voice control or an app. This form of operation is not only more convenient, but can also be made fully automated and set depending on the time of day and season as well as weather conditions. Automating external venetian blinds helps extent the life of the unit and improve the energy efficiency of buildings. Electric operation is generally a little more expensive than manual operation and requires a power supply. In the event of a power failure, optional extras such as the WAREMA SecuKit for external venetian blinds ensure a quick route outside at all times. Ultimately, the choice of operating mode for external venetian blinds depends on your personal requirements, preferences and budget. It's worth weighing up the pros and cons to both options and getting an opinion from a qualified specialist to find the best solution.