Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Advanced Human Recognition Technology: Leverage AI capabilities to distinguish between human presence and other moving objects like cars and pets. Included Indoor Chime: Install the accompanying chime unit within your home, such as in the kitchen, dining area, or terrace. Multiple chimes can be synced with a single doorbell for added convenience. Optional AES-128 Cloud Storage: Choose an optional subscription for AES 128-bit encrypted cloud storage (sold separately) and enjoy video recording, playback, and sharing. Real-Time Notifications: Stay informed with instant alerts to your mobile device when the doorbell is rung or motion is sensed, keeping you in the loop with front door activities. 2.4GHz Wi-Fi Compatibility: The doorbell is tailored for 2.4GHz Wi-Fi networks to ensure a steady and quick connection (5GHz Wi-Fi not supported). Colour: Gray + White Material: plastic Package Contents: 1 x doorbell 1 x Ding Dong(usb white model) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.