Will all of the features for this camera work on a phone if the camera is NOT connected to an NVR? (@Reolink, please answer this question instead of deleting it. Thanks.)

Yes, you can use features such as two-way talk, time-lapse, and customizing motion zones through the Reolink App on your phone without the camera being connected to an NVR.

can the siren be turned off?

Absolutely. As a rule, the siren is something you typically have to turn on(not turn off) for the factory settings on all Reolink cameras(I've bought).

Questions & Answers: REOLINK RLC-811A PoE IP Wired Security Camera 4K 123° FoV, 5X Optical Zoom for Outdoor Usage, Color Night Vision, Human/Vehicle/Pet Smart Detection, 2 Way Talk, Up to 512GB microSD Card(Not Included)

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REOLINK RLC-811A PoE IP Wired Security Camera 4K 123° FoV, 5X Optical Zoom for Outdoor Usage, Color Night Vision, Human/Vehicle/Pet Smart Detection, 2 Way Talk, Up to 512GB microSD Card(Not Included)

4K Ultra HD & 5X Optical Zoom & 123° Wide Angle: The varifocal lens allows you to 5X zoom in on the distant object without compromising the 8MP resolution. Cover almost every angle with the built-in wide 123° viewing angle (H: 105°, D: 123°), allowing you to keep an eye on what matters most.
Human/Vehicle Detection with Smart Alerts: This 811A PoE camera uses advanced AI to accurately identify people and vehicles by their shapes, reducing false alarms caused by animals, moving shadows, or light changes. You can easily adjust detection zones and sensitivity in the app to focus only on the areas that matter, ensuring more accurate alerts and fewer unnecessary notifications.
Full Color Night Vision with Spotlights: This 4K outdoor camera enables you to view clear images with brilliant color in live video streaming and playback. Once an intruder is detected, the cameras spotlights and siren will be triggered to warn off the would-be criminal. You could also manually activate the spotlights to stop the crime before it happens.
Time-Lapse Videos and Multiple Recording Options: With time-lapse videos, you can keep tracking your 3D printing, see the whole construction process in a few minutes, or capture beautiful views from sunrise to sunset. Time-lapse Videos or Recording Videos can both be saved on a microSD card (Up to 512GB, Not included), Reolink NVR, or FTP server. No hidden fee will be charged, and no extra subscription will be needed for multiple recording options.

$113^.99 –