Sc apc cover

product supports the a the GSM：850/900/1800/1900 network and GPRS standard quad-band, and can switch seamlessly between different networks. Compact; signal strength; voice; precise positioning; stable performance; the long standby。 Power on: Open the back cover, the SIM card inserted into the card holder automatically boot until the indicator goes off, you can use Monitoring to detect: normal boot, when necessary monitoring tools can dial the dial is turned to hear the status of the location around 10 meters Voice Callback:Phone open: with fixed-line or mobile phone SIM card number to get through the alarm hear ambient sound 2-3 seconds, hang up that set successfully, the default alarm status.(35 decibels of sound when the alarm within 4 meters, the alarm will automatically dial the number set). Positioning: Send SZHM # authorized person phone number # to the alarm, set the authorized person Tip: Send SZHM # authorized person phone number # to the product do not reply to successfully set the new guardian list before sending SC , etc. SMS Reply (deleted guardian list success), recurrence SZHM # authorized person phone number