... option 3.5 hours, varies with temperature and wireless data rate– GSM/GPRS 3.8 hours, varies with temperature•Certification Class ... 22, 24 FCC certification, 850/1900 MHz.Class 10 GSM/GPRS module. CE Mark approval, and C-tick approvalCommunications and Data Storage ... typical / 10 km optimal•Fully integrated, fully sealed internal GSM/GPRS option8• Fully integrated, fully sealed 2.4 GHz communications ...