... S3C2451 (533MHZ)3Mobile communicationThe built-in GSM/GPRS module, supportGSM/GPRS Class10, GSM 10 multiplexing4RAM128Mbyte ,F-ROM 128M ... AP and safety normsRS232 Built-in GSM/GPRS communication module15Drop strengthDrop height:1.2m,choose 1 ... 18Industrial gradeIP5419RemarkCan be expanded The built-in GSM/GPRS module, supportGSM/GPRS Class10, GSM 10 multiplexing20Standard configurationBluetooth V2.1 ...