304 stainless steel, anti damage and easy to install.
Wall mounted and build in hearing aidsn.
The wire was made by Teflon, oil resistance, acid resistance and alkali resistance.
Automatic dialing function: Press the emergency button, and it will automatically dial the designated number for you after 3 to 5 seconds.
Usage: Railway, Highway, Bank, University, Hotel, etc
Introduction: Explosion-proof telephones are specialized communication devices designed to operate safely in hazardous environments. These environments include areas with the...