The product is a GSM/3G Audio Intercom and the panel is made of stainless steel along with integrated molded plastic. It uses a smaller mother board compared to the other devices and also uses a high-quality and durable LED light button. It will dial to your phone for a call, in the call you can also use the phone to open the door.
model : SS1204
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
The SS91B-M product is a horizontal GSM intercom, designed for use with stainless steel. It uses a high quality durable button; the speaker & microphone is designed with a water repellent. It uses the GSM network, its main function when the visitor presses the call button (the call number can be added 3 sets out the number), it will dial to your phone for a call, in the call you can also use the phone to open the door
Model : SS91B-M