Gain instant alerts when visitors arrive at your home with the eufy s add-on Chime, designed for the Video Doorbell E340. Receive instant app notifications when a guest or delivery person rings the doorbell or motion is detected at the door. Customize the volume and select from 8 chime options while installation is a breeze. Simply plug the chime into a wall outlet, connect to your 2.4 GHz Wi-Fi network then follow the app prompts. It expands video storage up to 128 Gb with a microSD card (not included) and footage is stored locally and protected even if the video doorbell is damaged or lost. eufy's add-on chime is compatible with the Video Doorbell E340 and all upcoming eufy video doorbells. (Does not support other eufy Security doorbells at this time.)