Watches & Wearables / alarm clock
Westclox Keno 15550
D0 No Radio — No radio at all. It cannot phone home.
The unplug test
There is no router to unplug and nothing to notice its absence. The clock keeps time and rings its bell alarm purely from a wound mainspring; you rewind it by hand every day or two. It has worked exactly the same way, with no changes possible, since the day it was made.
Why this tier: A traditional key-wound mechanical alarm clock: the movement and the bell alarm are both driven entirely by a wound spring. The manufacturer's own instruction manual states plainly, 'Your clock does not require batteries or electricity to operate,' and documents only mechanical controls -- a time winding key, an alarm winding key, an alarm on/off slide switch, and a mechanical +/- regulator lever -- with no battery compartment, cord, or electronic component anywhere. A device with no electrical power source at all cannot contain an intentional radiator, so this is the clearest possible D0: no radio because there is no electronics to hold one.
Specifications
| Account required | none |
|---|---|
| Works offline | fully |
| Forced firmware updates | no |
| Radios | none |
| FCC ID | no intentional-radiator grant found |
| Local control | none |
| Phones home | none |
| Parts available | limited |
| Availability | limited |
| Price band | $15-30 (seen 2026-09-03) |
| Vendor risk | 0 / 3 |
Where to buy
Open questions
- Real-time stock status varies by retailer (sold out at the Westclox-authorized store, apparently available at McCoy's at time of check) -- worth re-checking before publishing to confirm current purchasability.
- No FCC search was run for this model since a device with no battery compartment or power source cannot contain an intentional radiator; this is treated as self-evident rather than requiring a grantee search.
Sources
Class A is primary (manual, FCC filing, teardown). Class B is corroborated community reporting. Class C is never sufficient alone.
- A https://cdn.shopify.com/s/files/1/0791/5356/1815/files/User_Manual_MODEL_15550.pdf?v=1768840363
Official Westclox 'Instructions & Warranty' manual for Model# 15550 / 15550CN, warranty administered by NYL Holdings LLC (the current owner of the Westclox brand). States directly under Time Wind-Up: 'Your clock does not require batteries or electricity to operate.' Documents the fully mechanical operation: a wound time spring runs the movement for at least 24 hours, a separate alarm winding key powers the bell alarm, and a mechanical +/- regulator lever adjusts timekeeping accuracy -- no battery compartment, cord, or electronic component described anywhere in the instructions. — accessed 2026-09-03 - C https://www.mccoys.com/shop/p/7198559-052303-19/westclox-15550-loud-bell-alarm-clock-plastic-case-white-case
Independent hardware-store retail listing for the same model 15550, corroborating: 'it requires no batteries or electric power to keep time,' key-wound mechanism, independent alarm indicator, luminous hands, priced $17.44 with no sold-out notice. — accessed 2026-09-03
History
- 2026-09-03 — First published at D0.
Last verified 2026-09-03 — 3 days ago.