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SD802 GSM Dialer
Features：
â—†Universal type for security application
â—†Support GSM 900/1800MHz frequency
â—†Instruction to send a reporting SMS message to the preprogram phone number
â—†Set up program by sending SMS message
â—†Provide 3 digital input and 1 signal output
â—†Power by 9V/1A switching power supply
â—†8 hours power back up by 4*1.5V AAA type rechargeable battery pack
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