Review

eufy Indoor Cam S350 Review: 4K Dual Lenses, AI Tracking, and What Owners Say

By HTB Research Team · Updated September 23, 2026 · 8 min read

Data-research based · Owner-feedback aggregated · Prices checked Sep 2026

Most indoor cameras solve “can I see the room.” The eufy Indoor Cam S350 tries to solve “can I see what is actually happening” — with a 4K wide lens and a 2K telephoto lens in one body, and AI tracking that follows people and pets across the frame. It is the closest thing to a PTZ camera without the motor noise.

eufy Indoor Cam S350 white dual-lens security camera — eufy Indoor Cam S350 with its dual-lens module (product image).

Key specs at a glance

Dual lenses: 4K (8MP) wide + 2K telephoto with up to 3x zoomed detail
AI tracking: 360-degree auto-follow for people and pets
Local options: works with HomeBase 3 for on-device storage, no subscription required
Privacy: physical shutter mode and scheduling

Across Chinese owner communities

The S350 shows up in 什么值得买 threads mainly for one reason — the dual-lens zoom that actually reads a label or a face at the far side of a room:

“The zoom is the point” is the consensus. Owners compare it to 2K single-lens cams and say the 3x zoomed detail changes what the camera is for — from “motion alert” to “what actually happened.”
AI tracking is good, not perfect. It follows people reliably; fast pets occasionally lose the lock for a second.
No-subscription praise is loud. Pairing with HomeBase 3 for local storage is the most-cited setup among owners who refuse cloud fees.
Recurring complaint: at 4K, the wide lens needs good light indoors — dim rooms look softer than the spec sheet suggests.

Honest catch

The S350 is the best indoor camera under $100 for “detail capture” — but it is a mains-powered indoor camera, not a wire-free outdoor unit, and the 4K wide lens is light-hungry. If you want zoomed clarity over a big room without cloud fees, it wins. If you just need a cheap alert machine, simpler cameras cost half.

Typical street price: $69-$91; event-season lows have touched $55.

A white dual-lens security camera on a bookshelf in a study — The S350 watching over a home study — illustrative scene, not an owner photo.

Bottom line

For pet owners, parents, and anyone who wants “the detail version” of indoor monitoring, the eufy Indoor Cam S350 is the 2026 pick — and it pairs perfectly with HomeBase 3 for a subscription-free setup. A $55-65 target on Oct 6-7 is realistic.

Check eufy S350 on Amazon

Sources

Amazon U.S. listing – eufy Indoor Cam S350 reviews (Sep 2026)
Owner threads on 什么值得买 – dual-lens zoom and HomeBase 3 setups
PCM / jurismate – S350 coverage

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