Network-free Smart GSM Alarm
This product is a GSM wireless smart alarm. It only needs a smartphone card and can pair with the multi-function alarm center. Without the need for a network and a server, it can send text messages to pre-bound smartphone or automatically dial the alarm number for various remote alarm situations, so that users can promptly understand abnormal situations in unattended environments. This product, together with the multi-function alarm center e501 and a variety of sensors to form a multi-function alarm system.
