The conclusion It publishes the one figure nobody else does, its screen resolution of 480 × 320, and about 165 pixels per inch across 3.5 inches is an honest answer to how good the picture looks. Everything else is missing or unusable: no door thickness, no bore diameter, nothing whatever about the battery, a 720p camera that nothing can display, 24 hours monitoring with no recording, and five empty bullet points where the rest of the specification should be.
No door thickness. No peephole bore. No battery. No storage.
Five empty bullets
Which is the state of the page.
Five written entries, then five blank ones. Not short — blank.
The one figure nobody else gives
Four hundred and eighty by three hundred and twenty.
No other viewer on this shelf publishes a screen resolution, and this one is
worth having: about 165 pixels per inch across 3.5 inches.
That is legible at arm’s length. It is not sharp. Now you know.
And a camera nothing can display
Seven hundred and twenty p, behind that screen.
The screen is the only output published — no storage, no card, no app, no video
out.
So 1280 × 720 is downscaled to 480 × 320 before it reaches your eye, which throws
away about four fifths of the pixels.
The claim is not false. It is unusable.
The two numbers that decide the purchase
Neither of which is here.
Door thickness range, which this shelf’s introduction calls the first check. Bore
diameter, which the buying tip asks for before that.
At least two of the nine viewers on this shelf give both: 40–100 mm (1.57 to 3.94 in) and 35–100 mm (1.38 to 3.94 in) of door,
14–28 mm (0.55 to 1.10 in) of bore.
Until a seller puts those in writing, this cannot be planned.
Availability
On sale at around $58 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
What reassures, and what does not
Strengths
A screen resolution published, which no other viewer here gives
A zinc alloy outdoor camera, as on the most expensive viewer in this group
480 × 320 across 3.5 inches is legible at arm's length
A 720p camera claim, the highest figure on the shelf
Fifty-eight dollars, in line with the two mid-priced viewers here
A slim coated indoor unit
Compromises
Five empty bullet points
No door thickness range: the shelf's first check is absent
No peephole bore range either
Nothing at all about the battery — type, count, runtime or inclusion
A 720p camera behind a 480 × 320 screen, with no storage or output to use it
24 hours monitoring is claimed with no recording of any kind published
Specifications
Screen
3.5-inch LCD color display at 480 × 320 — stated. It is the only screen resolution published on this shelf, and a useful figure: 480 × 320 across 3.5 inches is about 165 pixels per inch, which is legible rather than sharp
Resolution
Up to 720p image resolution claimed for the camera. That is more pixels than the 480 × 320 screen can display, so the full resolution exists only if the images are read elsewhere — and no storage or output is published
Field of view
120 degrees — stated, the same as every viewer on this shelf
Finish
A zinc alloy outdoor camera with a coated plastic indoor cover, stated light and slim
Door thickness
NOT PUBLISHED. This shelf's introduction calls this the specification to check first
Peephole bore
Not published. This shelf's buying tip says to measure the existing barrel diameter before the door thickness, and no hole range appears
Battery
Not published. No cell type, no count, no runtime and no statement of whether batteries are included
Storage
Not published. The listing claims 24 hours monitoring, which on a press-to-view peephole viewer with no stated recording is a claim about availability rather than capture
Function
Five of the ten bullet points on this listing are empty — five blank entries following five written ones. Nothing fills them
Amazon reference
B08KXXJDFV
EAN
8851676522240
The questions we are asked
Can I tell whether it fits?
No, and that is the finding. This shelf's introduction names door thickness range as the specification to check first, because the barrel has to span the door and clamp on both sides, and the buying tip asks for the peephole bore diameter before anything else. This listing publishes neither. At least two of the nine viewers on this shelf publish both, with ranges of 40–100 mm (1.57 to 3.94 in) and 35–100 mm (1.38 to 3.94 in) for the door and 14–28 mm (0.55 to 1.10 in) for the bore. Until a seller puts those two numbers in writing, this is not a purchase you can plan.
What does a 720p camera behind a 480 × 320 screen mean?
That you will never see 720p. The screen is the only output published — there is no storage, no card slot, no app and no video out — so the camera's 1280 × 720 is downscaled to 480 × 320 before it reaches your eye, which discards about four fifths of the pixels. The sensor claim is not false, it is unusable. What the 480 × 320 figure does tell you is something real: about 165 pixels per inch across 3.5 inches, which is legible at arm's length and not sharp.
What does "24 hours monitoring" mean here?
That the camera can be woken at any hour, as far as the page supports. Nothing on this listing describes recording, motion detection, storage or a card slot, so there is no mechanism by which anything would be monitored while you are not looking at the screen. The phrase appears on two viewers on this shelf and in neither case is backed by a capture claim. One viewer here does store images — seventy-five photos to built-in memory — and it is a different product.
Against the rest of the digital door viewers
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
Model
Price
Screen
Field of view
Socobeta 3.5-inch digital peephole viewer, 480 × 320 screen
$58
3.5-inch LCD color display at 480 × 320 — stated. It is the only screen resolution published on this shelf, and a useful figure: 480 × 320 across 3.5 inches is about 165 pixels per inch, which is legible rather than sharp
120 degrees — stated, the same as every viewer on this shelf
If price decides: H-COME 3.5-inch digital peephole viewer, 2 Mega CMOS, 4 × AAA, at $56.
What this one costs among digital door viewers
Details checked on October 8, 2026.
The buyer this one serves, among security devices
Nobody, until the seller supplies a door thickness range and a bore diameter in writing
What buyers actually choose
Amazon reports what buyers took in the month before this page was last checked: at least 50.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Sources
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
3.5-inch LCD · 1 Mega CMOS · 120° actual viewing angle · door hole 14–28 mm (0.55 to 1.10 in), door thickness 40–100 mm (1.57 to 3.94 in), both published · indoor unit 120 × 62 × 20 mm (4.72 × 2.44 × 0.79 in) · outdoor camera 32 mm (1.26 in) · 4 AAA, not included · low-battery alert · press to wake, no standby drain
One of only two viewers here that publish both the door thickness range and the peephole bore — the two measurements this shelf says to check first.
Best for: A tenant replacing an existing peephole who needs to know it will fit before ordering
3.5-inch LCD · 2 Mega CMOS · 120° · door hole 14–28 mm (0.55 to 1.10 in), door thickness 35–100 mm (1.38 to 3.94 in), a wide range · indoor unit 120 × 62 × 20 mm (4.72 × 2.44 × 0.79 in) · camera ≈30 mm (1.18 in) · 4 AAA, not included · battery changed without removing the unit · the only listing here that argues against itself
The widest door range on the shelf, and the only listing on this site that tells you what its own product cannot do.
Best for: A thin apartment door — 35 mm (1.38 in) up — where the honesty about low light is worth more than a night vision claim
3-inch TFT LCD · 1 MP IR camera with two 850 nm infrared lamps, the only night vision here · 120° · 75 photos to built-in memory, no card · 1200 mAh lithium battery, up to 180 days standby · zinc alloy · NO door thickness range and NO peephole bore published
The only viewer here that sees in the dark, stores pictures and recharges — and the only one that will not tell you whether it fits your door.
Best for: An unlit communal landing, on a door whose thickness and bore you can confirm with the seller first
