ESY-Pen and ESY-App, a duo for everything: 1. Parameter setting, 2. Remote control, 3. Light measurement, 4. Project management. Simple and quick commissioning of complex lighting controls. Easy to use for every user. Bluetooth-enabled, independent of physical hardware interfaces. Compatible with all smart devices running iOS and Android. Backward compatible with all current presence and motion detectors as well as emergency lighting controls from ESYLUX that can be remotely controlled. Usable as a tabletop device for individual light measurement and control. Also suitable for operating smartphones and tablets. Easy management of settings in project libraries. ESY-Pen.