Is the ZOSI C519M really 4K?

No. ZOSI lists it as 4MP, which is about 2K, not 4K. Expect a sharper image than 1080p but not true 4K detail.

Does it work on 5GHz Wi-Fi?

Yes. It supports both 2.4GHz and 5GHz networks, which helps if your router's 5GHz band reaches the room.

Can I use it without a subscription?

Yes. It records to a microSD card locally. Cloud storage is optional and usually sold as a plan.

Does it need to be plugged in?

Yes. It runs on corded electric power, so you need an outlet near where you mount it.

Is $39.99 a good price?

Only one new price, $39.99 at eBay as of November 8, 2026, is listed, so there is no recent range to compare. For a 4MP pan-tilt camera with AI detection, that is a low entry price.

Where is the ZOSI C519M 4K Dual-bands Wi-Fi Indoor Camera cheapest?

At eBay, for $39.99, as of our latest check.

ZOSI C519M 4K Dual-bands Wi-Fi Indoor Camera

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$39.99at eBayObserved at 11:48 PM

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Our take on the ZOSI C519M 4K Dual-bands Wi-Fi Indoor Camera

The ZOSI C519M is a corded indoor pan-tilt-zoom camera that records 4MP video at 20 fps over 2.4GHz or 5GHz Wi-Fi. It adds AI person and animal detection, color night vision to about 33 ft, and a 360-degree panoramic view. Footage can go to a microSD card or ZOSI's cloud. At $39.99 at eBay as of November 8, 2026, it is the only new price listed, so there is no recent range to compare against.