Devices that still work when the internet doesn't.

Baby & Pet / breast pump

Spectra Baby USA S1 Plus Rechargeable Double Electric Breast Pump

D0 No Radio — No radio at all. It cannot phone home.

The unplug test

There is nothing to unplug except the pump itself. It runs on physical buttons and an internal rechargeable battery, remembers your last session's settings on its own, and shuts off automatically after 30 minutes with no phone, app, or account involved at any point. It has behaved identically since the day it was made and always will.

Why this tier: Both the manufacturer's own product page and its own setup/operation instructions describe the S1 Plus entirely in terms of physical buttons, a digital display, and a rechargeable battery, with no mention of WiFi, Bluetooth, an app, or an account anywhere. No radio is claimed by the manufacturer or found by any reviewer. No intentional radiator, no vendor cloud: D0.

Specifications

Account requirednone
Works offlinefully
Forced firmware updatesno
Radiosnone
FCC IDnot checked
Local controlnone
Phones homenone
Parts availableyes
Availabilityin stock
Price bandunknown
Vendor risk 0 / 3

Open questions

Sources

Class A is primary (manual, FCC filing, teardown). Class B is corroborated community reporting. Class C is never sufficient alone.

History

Last verified 2026-09-04 — 2 days ago.