Listings show two main connection types: closed-loop 2.4 GHz radio with FHSS (non‑Wi‑Fi) and Wi‑Fi models that stream video to smartphone/tablet apps.
Advertised maximum operating ranges vary by model; example listings show ranges roughly from 650 feet up to about 1,000 feet.
Models use a mix of power options: replaceable batteries (including coin cells and various lithium types), built‑in rechargeable batteries, and mains/USB power via AC adapters or USB cables.
Wi‑Fi models offer live remote access via smartphone/tablet apps, HD video streaming, on‑board or motion‑triggered recording, and remote two‑way talk.
Most entries mention night‑vision capabilities, typically infrared or automatic infrared that activates in low light for dark‑room viewing.
