Optimal Power Supply: The modular power supply unit provides a reliable power source for Legrand's EasyKit intercom sets. Power is supplied easily and efficiently through the included modular power supply unit, allowing for a visually stylish and simple installation with hidden wiring. Flexibility: The modular power supply unit is perfectly aligned with the flexibility of the EasyKit intercom sets. The system can be easily expanded with additional cameras, ensuring your security. 2-Wire Technology: The 2-wire technology allows for quick and easy installation. The modular power supply unit supports this technology, making it easy to replace existing doorbell systems, ideal for new constructions and renovations.