The Alarm.com ADC-W115C is a 2.4 GHz WIFI extender as well as a configurable chime for the Alarm.com wireless doorbell cameras. It requires power from a standard unswitched outlet. It's added to the existing network using WPS or AP mode and is then added to the Alarm.com account. Once added to the account, it extends the 2.4 GHz WIFI network and will chime for any ADC wireless doorbell cameras that have the feature enabled.