Feature: 1. The input of GA09‑B is a switch signal. When the input port is short‑circuited with the ground (GND), GA09‑B will send an alarm message to the preset alarm phone, or call the set alarm number. The content of the alarm message can be set by yourself. 2. Up to 6 groups of called numbers can be set. When the alarm input has a trigger signal, an alarm message will be sent to the alarm number, or you can call the alarm directly. 3. We have professional customized APP, support for iOS/Android system, you can simply send messages through APP to set up. 4. Built‑in 3G module, compatible with GSM version. The input port can be selected as NC or NO alarm mode. 5. Widely used, includes home security, warehouses, remote computer rooms, industrial monitoring sites, security protection, home security and other unattended points. 6. Use easily and conveniently, it can be easily embedded into other equipment, as a remote alarm system. 7. The wide voltage of this GSM alarm box is DC5 to 15V DC for power supply. Specification: Condition: 100% Brand New Item Type: GSM Alarm Color: Black Material: ABS PlasticVoltage: DC5V-DC15V Number of Channels: 8 Size: Approx. 66x56x22mm/2.6x2.2/0.9in Communication Interface: Wireless Alarm Type: SMS Equipment Configuration: Door/Window Sensor Applicable to Europe, America, Australia, and the corresponding operating frequencies are as follows: EU Version: UMTS: 900/2100MHz, GSM/EDGE: 900/1800MHz US Version: UMTS: 850/1900MHz, GSM/EDGE: 850/900/1800/1900MHz AU Version: UMTS: 850/2100MHz, GSM/EDGE: 850/900/1800/1900MHz. Package List: 1 x GA09-B 3G GSM SMS Call Alarm 1 x Antenna 1 x Connection Cable 1 x Description