Devices that still work when the internet doesn't.

Baby & Pet / audio monitor

VTech DM221

D1 Local Only — Speaks only to hardware you control.

The unplug test

Nothing changes, and nothing ever could. The two units talk to each other directly over DECT — the same technology as a cordless phone — and neither has the hardware to reach your router, let alone the internet. There is no app, no account, no pairing to a phone, and no video stream sitting on someone's server. It is a radio link between two objects in your house.

Why this tier: FCC grants for both the baby unit and the parent unit cover DECT only (1921.536-1928.448 MHz) with no Wi-Fi or Bluetooth. The single radio present is a point-to-point link between two units the owner holds, so there is no path to any vendor service.

Specifications

Account requirednone
Works offlinefully
Forced firmware updatesno
Radiosdect
FCC IDEW780818000A / EW780818001A
Local controlnone
Phones homenone
Parts availablelimited
Availabilityin stock
Price band$35-60 (seen 2026-09-02)
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 2026-09-02 — 4 days ago.