The product is a vertical GSM intercom, made of stainless steel to monitor and manage your house/facility/warehouse entry points through your mobile device. It uses a high quality durable button along with water resistant speaker and microphone.

model : SS91BV-M

Features

Answer the gate intercom and open the gate from anywhere in the world
Calls up to 3 numbers landline or mobile
No wires from the house to the gate.
Simple to set-up by sending SMS
Anti-Vandal and stainless steel design
Wireless Intercom through GSM network
1152 user caller ID access control by free call

GSM intercom, specification

Operating Voltage	12 to 24 Volt AC/DC
Operating Current	Maximum 250 mA, Typically 55mA
GSM / 3G Module	Cinterion / Simcom
GSM / 3G Frequency	GSM 850/900/1800/1900 MHz
Physical size	Face plate: 170 x 100 mm, Stainless cabinet: 174 x 113 x 65 mm
Length of antenna	3 meters cable
Humidity	Less than 80% RH
Operating Temperature	-20℃ to 50℃