I've been waiting for a company to develop this device for years now. Chamberlain and Guardline use beeps and little tunes to notify you, but if you have a bunch of sensors you still have to remember where those beeps and tunes are. The Yolink speaker lets you put in whatever custom announcement you want, motion detected at driveway, patio, garage door, wherever. I've so far got it announcing for several Yolink indoor and outdoor sensors, it can connect to all the Yolink sensors (as far as I know). Kudos to Yolink, those other companies missed the boat on this one!