Wireless Smart Video Doorbell HD Camera 2-Way Audio WiFi Security Ring Intercom
Dingdong RF Code: EV1527. 1 Dingdong Machine. Multiple User Access : Share video doorbell access with up to 10 users via the app. Product Model: Doorbell. Keys: 2 (Doorbell key and Reset key). Infrared Lamp Wavelength: 850nm.