Four-band frequency GSM for global use; Built-in power switch, input voltage DC9-24V; Built-in vibration sensor to realize intelligent anti-theft vehicle; Can set multiple SOS alarms and anti-theft alarms; Can set 10 vice president numbers to receive device response messages; Can connect external SOS button for emergency assistance (optional); Can connect external relay to control vehicle oil and circuit (optional); Built-in backup battery to prevent illegal wire cutting alarm (optional); Support original vehicle anti-theft
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