GSM Alarm with Microphone and Speaker (S3524A):

The GSM Alarm System S3524A suitable for all security requirement customers.
The GSM Alarm System with SMS Alert function, and supports SMS Commands;
The GSM Alarm System with LCD and with microphone and speaker;
The GSM Alarm System accepts 15 Wireless Sensors;
The GSM Alarm System is programmable all sensors' name and place address.
kingpigeongsm(at)gmail.com