eufy Indoor Cam S350

Two lenses and the 8x zoom

The S350’s point is that it does not ask one sensor to do everything. A 4K wide-angle lens with a 130° diagonal field of view at f/1.6 covers the room, while a separate 2K telephoto lens with 3x optical zoom at f/1.6 holds detail at distance. eufy markets the pair as 8x hybrid zoom and defines it in its own FAQ as 3x optical plus up to 8x digital, so the optical part is 3x, not 8x. Trusted Reviews used the camera as its main security camera over an extended period and called the 4K daytime image exceptionally sharp and vibrant, better than any other indoor camera it had tested, and the AI tracking smooth where other pan-and-tilt cameras move jerkily. The one substantive criticism is dual view mode: switching on both streams drops both cameras to 2K and stacks them into a single file with artefacts, weaker colour accuracy and less sharpness, so record from the 4K lens only. Motion recording defaults to the 4K camera, which is the right setting.

Local storage and running costs

Recording is local and does not require a subscription: a Class 10 microSD card up to 128 GB, not included, or a HomeBase S380 or HomeBase 3. eufy says a 128 GB card holds up to 120 hours (5 days) of continuous recording at the highest resolution, and the reviewer calls 128 GB enough for months in normal event-based use. Cloud is an add-on: the reviewer quotes the eufy cloud service at $2.99 a month, while eufy’s own store lists an eufy Plus membership at $15.00 a month that includes cloud backup history and extends the warranty to 18 months. Cross-camera tracking needs a HomeBase S380 and, after a free 3-month trial, carries charges.

Night vision, placement and compatibility

In low light the camera switches to IR black and white; the image is softer and facial detail drops slightly, though the resolution compensates. Two placement rules come from the official guide and are easy to miss: the telephoto lens wants at least 8 ft (2.5 m) between the camera and the subject area, and the camera should sit at least 0.7 ft (0.2 m) clear of walls and objects or IR reflections will degrade night vision. Compatibility is the decisive point for many buyers: eufy states the S350 works with Amazon Alexa and Google Assistant, including streaming to smart displays, but has no HomeKit and no Google Home support. The app is workable, though the reviewer found timeline playback less smooth than Ring’s and noted that AI-tracking clips were labelled 2K in the app even when the downloaded files were 4K.

Is it worth it?

eufy’s US store lists the Indoor Cam S350 at $139.99. Deal coverage headlines put it near $99.99 and as low as $85, though those pages were not verified, so treat them as reported promotional points. Around $100 the case is straightforward for anyone who wants a real telephoto lens, 360° pan and local recording with no subscription; at $139.99 the value is weaker, and without HomeKit or Google Home a simpler fixed-lens 4K indoor camera is worth comparing. Warranty is 12 months, rising to 18 with an annual eufy Plus membership, alongside a 30-day money-back guarantee. Either way, the operating advice from the only full test available is the same: record from the 4K lens and use the telephoto for live viewing and detail.

Which model this is

This page covers the eufy Indoor Cam S350, US SKU T8416121, model series T8416, sold as ASIN B0CD7F1M9R. It is the dual-lens model. Do not merge it with the eufy Indoor Cam E30, the SoloCam S340 or the eufyCam S3 Pro, and do not confuse it with the single-lens 4K model T8417121 or the 2K model T8410121. A spec table embedded on eufy’s own product page describes the eufyCam S3 Pro, not this camera.

Sources

Manufacturer:

• eufy Indoor Cam S350 (US product page)
• eufy Indoor Cam S350 overview
• Indoor Cam S350 user guide
• Indoor Cam S350 support

Independent reviews:

• Trusted Reviews: Eufy Security Indoor Cam S350 review

Deal coverage:

• Deal headlines for Indoor Cam S350 (Google News)

Owner reports:

• No exact-model owner threads were found in the sources.