Extel’s Q-AIR Umii connected doorphone reinvents the way you welcome your visitors, thanks to a unique system: with its engraved QR code, your visitors flash it from their smartphone and contact you instantly, with no need for an application or visible number. Elegant, durable and secure, it’s easy to install wirelessly, and lets you chat with your visitors via theExtel Umii videoapplication, wherever you are.