The Aqara Light Switch H2 (WS-K4070) is a versatile smart switch designed to integrate your lighting into a modern home automation system. It offers exceptional flexibility during installation by supporting both neutral and no-neutral wiring, meaning you can fit it into older homes without needing to run new cables, provided the load is at least 5 W. This model stands out with its support for Matter over Thread, Zigbee, and Bluetooth, allowing it to work seamlessly across ecosystems like Apple Home, Amazon Alexa, Google Home, and SmartThings. One of its most practical features is MARS technology, which ensures your smart bulbs remain reachable and online even when the physical switch is turned off. When installed with a neutral wire, the switch also monitors power consumption, giving you a clearer picture of your energy usage. For those who prefer a customized setup, the buttons can be converted into wireless triggers to control other devices in your home. Safety is handled by built-in overheat and overload protection, while the 86 x 86 x 45 mm white chassis is designed to fit standard System 55 frames from brands like Gira or Merten.