This document describes the features and characteristics of the Intrusion | Entry Door Phone HC-3210/HC-3220 non-visual indoor unit, including fireproof and UV-resistant high-strength plastic casing, simple and stable design, etc.
HC-3210/HC-3220 non-visual indoor units adopt a handset call mode and have features such as anti-theft functions, emergency alarm functions, simple programming methods, and the ability to connect to systems and expand connections.
