Legrand D21 is a range of products from the company Legrand that provides a complete solution for smart home automation. The products are designed to help you create and control automated home systems, including lighting, climate control, audio/video, security, surveillance, and other connected devices. The system works with both wired and wireless devices and is compatible with a wide range of products from leading manufacturers. With the D21 range, Legrand provides a complete home automation solution to meet your lifestyle needs. With single device control, voice commands, and remote access via Legrand's companion app, you can easily monitor, adjust, and control your home from anywhere.