... , monitoring system and others wide fields, SMS gatewayApplications Supermarket: Advertisement SMS, Promotion SMSSchool and educational department: School notice ... , enterprise, after-service department, etc. Send advertisement SMS, Promotion SMS, school notice, school report, notice for electricity and ... ,200bits/s;USB: USB2.0;Support full AT commands;l Other InterfacesAudio: EAR with MIC and SPK ...