dumb phone

The listings show a mix of power options: some units list no battery required, others use rechargeable Nickel‑Metal‑Hydride (NiMH) cells (commonly 2 × AAA; one listing references “3 (Non-Universal)”), and several require 2 × AA alkaline batteries.

Reported battery/talk times vary by model: listings range from about 3.5 hours up to 12 hours of charge life, and several cordless handsets advertise roughly 10 hours of talk time.

Most listings use DECT 6.0 (operating around 1.9 GHz). A few devices are listed as operating on 1.9 GHz without the DECT label, and at least one handset listing uses 900 MHz.

Models offer a variety of call-blocking and spam-protection features, including automated and one-touch call block, a dedicated call-block button, one-ring scam alerts, and listings that advertise up to 1,000 pre-blocked numbers.

Listings commonly include hands-free speakerphone capability; some models also specify intercom and baby-monitor functions in addition to speakerphone.