... Features of the GSM GPRS Power Facility Alarm S250:1.GSM/GPRS Data Transmission, no distance limitation;2.Lighting protection design;3 ... Center.Outdoor Installation and Bind anti-theft of GSM GPRS Power Facility Alarm S250: Standard Package list of the GSM GPRS ... on the network condition)Relative Humidity: 10 to 90%, No condensationGSM Band: 850,900,1800,1900MhzGSM Emission Power: GSM850,EGSM900 ...