The Aqara Dimmer Switch H2 EU (K0-R01D) is a smart lighting controller in white that allows you to precisely adjust brightness from 1% to 100%. It offers great flexibility during installation because it supports both neutral and single live wire modes, fitting seamlessly into EU-standard 55 series frames such as those from Legrand AtlasDesign or BERKER. By utilizing Thread and Zigbee protocols along with Matter support, this switch integrates easily into various smart home ecosystems via the Aqara Home app. Depending on your bulbs, it can handle a maximum load of 300W for incandescent or halogen lamps and up to 200W for dimmable LEDs and CFLs. You can manually choose between leading edge and trailing edge dimming modes to ensure compatibility with different fixtures, including ELV and fluorescent lights. If you install the device using a neutral wire, you also gain access to power metering to track your energy consumption. The unit measures 86 x 86 x 55.45 mm and includes helpful visual feedback through its indicator light, which changes color to signal pairing status or alert you to overheating. It is a practical choice for those wanting to create dynamic scenes or maintain their preferred lighting levels thanks to the power-off memory feature.