The FIBARO Walli Switch is a small flush-mounted module combined with an optically appealing switch which can be used to switch one or two light sources. So you can switch off the light even when you are not at home. The small FIBARO Walli Switch measures the active power and the energy consumption. With its LED ring you are informed about the current energy consumption. The installation is easy and can be carried out according to your individual wishes. Use the included switch, which was inspired by the timeless elegance and flowing appearance of a pearl, or your own switch series (GIRA System 55**, Legrand Celiane, Schneider Odace). The FIBARO Walli Switch can be used for the following luminaires: conventional incandescent lamps and halogen lamps, LED lamps, fluorescent lamps, electronic transformers (for ELV halogen lamps and LED light bulbs), ferromagnetic transformers (for MLV halogen lamps). Power Supply 110-230V~ 50/60 Hz. Recommended external overcurrent protection 10A type B circuit breaker (EU) 13A type B circuit breaker (Sweden). Active element micro-gap relay μ. Recommended wires cross-section area between 1.5-4.0mm2. For installation in flush-mounted boxes Ø = 60mm depth ≥ 40mm. Operating temperature 0-35 °C. Ambient humidity 10–95% RH without condensation.