A Wifi Connected Chime That Can Be Plugged Into A Standard Wall Outlet And Paired With A Unifi Protect Doorbell. This Device Is Ideal For Homes Without A Wired Chime System Or One That Is Incompatible With Their Protect Doorbell. Managed With The Unifi Protect Application: Version 2.0 And Later (Web) / 1.6.2 And Later (Ios) / 1.6.0 And Later (Android)