What the maker puts in writing
- “The digital TV converter box, converts digital air channels to your analog TVs. Allow you to watch TV channels on your analog TV or computer monitor”
- “[CLEARQAM COMPATIBLE] This converter box supports ClearQAM and can be used with a cable provider to watch unscrambled cable channels”
- “[SAVE TV PROGRAM] iView-3300STB digital converter box with clock function supports TV program saving function”
- “[UNIVERSAL MEDIA PLAYER]… play videos, music, and watch photos via the converter box’s USB port. Supports up to 4TB portable hard drive”
- “[New Firmware] A new firmware update is now available to resolve existing issues and enhance overall performance. Please contact iView technial support for detail”
- “The iView converter box only works on USA, Canada and Mexico region”
The regional restriction is the honest part
The iView converter box only works on USA, Canada and Mexico region.
No other listing on this shelf says it, and it is true of all ten.
ATSC is the North American digital terrestrial standard. Europe, Africa, Australia and much of Asia use DVB-T or DVB-T2; Japan and Brazil use ISDB-T. Those are different modulation schemes — an ATSC tuner cannot decode a DVB-T signal any more than an FM radio can receive a television channel.
So every box here is useless outside North America. One of them tells you.
But the ATSC version is the question it does not raise
The bullets say “ATSC” without a number, which means ATSC 1.0 — the United States digital broadcast standard since 1998.
Its successor, ATSC 3.0 or “NextGen TV”, carries 4K and HDR, receives better in difficult locations, and is being rolled out station by station. As a broadcaster moves a channel to 3.0, a 1.0-only box stops receiving it.
On this shelf:
ADTH NextGen TV Box Gen 2, $159.99 — “ATSC 3.0 + ATSC 1.0 tuner in one box”. The only one.
Mediasonic HW250STB, $39.99 — “This Box does NOT support ATSC 3.0”. The only one that warns you.
Tablo, $159.95 — “4 ATSC 1.0 tuners”, stated in passing.
The other seven, this included — silent.
At twenty-nine dollars that is a reasonable gamble if the box is for a spare television. On a main set it is the thing to think about.
And it is the smallest box here
152 × 95 × 44 mm. Against 220 × 147 × 40 and 220 × 45 × 202 for iView’s own 3500 models, 206 × 55 × 220 for the DP, and 163 × 216 × 46 for the Zenith.
Which matters for where it goes: behind a television, on a shelf, in a drawer. The built-in digital clock named in the title is the complementary idea — a converter box that shows the time is one you leave visible.
Clear QAM, and its real use
A Clear QAM tuner receives the cable channels an operator sends unencrypted, straight off the coaxial, with no cable box.
The honest footnote belongs to the Mediasonic listing: “The channel must be UN-ENCRYPTED signal.” United States operators now encrypt nearly everything, so what remains clear is typically just the local must-carry channels — which an antenna would give you anyway.
Where it genuinely earns its place is the use allaboutadapters names and nobody else does: “private QAM channels generated by modulators” — the in-house channels hotels, hospitals, schools and gyms distribute over their own coaxial.
Six of the ten boxes here have the tuner.
Four terabytes, with a caveat from elsewhere on the shelf
This listing publishes “up to 4TB portable hard drive” and no filesystem.
The ZJBOX does publish one, and it reveals a limit the others leave out: “external hard drives with a FAT32 file system capacity of up to 4TB”. FAT32 cannot hold a file larger than 4 GB — so a high-definition recording longer than roughly two hours either fails or is split. And Windows will not format a 4 TB drive as FAT32 with its standard tools.
Whether this box has the same constraint is not stated.
Mediasonic adds the other warning nobody else gives: use an external hard drive, because “USB flash drive is not recommended”. Recording television writes continuously, and a flash drive’s sustained write speed and write endurance are both poor for that.
What is not published
No box contents. ZJBOX itemizes a remote, an HDMI cable, a composite cable and a 1 year warranty — the only warranty term on this shelf. Mediasonic supplies a 5 ft HDMI cable and a large remote. Zenith supplies an RF cable, AV cables and a universal remote.
No antenna — which every box here requires and only the Tablo supplies, with a stated 35-mile range.
No composite or RF output. HDMI only, so a television with just an antenna input is out. iView’s own 3500 models add Channel 3/4 and A/V; allaboutadapters publishes four simultaneous outputs.
No weight. No remote stated.
Prices quoted in this text were read on October 4, 2026. The live price is at the top of the page.
