Compare VTech SN7021 Cordless Audio Doorbell - Silver/Black

Accessory device only--requires the VTech SN5127 or SN5147 to operate (sold separately)2-way audio lets you carry out conversations with visitors without opening your door, keeping you safeWeather-resistant doorbell can withstand rain, snow, and hot or cold temperatures, so you can leave it outside all year longChangeable chime with adjustable chime volume lets you set the volume according to your preferencesCustomizable and pre-recordable emergency message lets you sound out a message in the event of an emergencyWall-mountable design makes it easy to mount next to your doorSystem can expand up to a total of 3 doorbells to cover all of your home's entrancesIncludes AC power adaptor