... , lightweight and flexible, shock drop resistance, long standby time, dual power mode, also with call feature. The new layout for the ... Communication module GSM/GPRS,Support GSM/GPRS Class10,GSM27.10 Power Source(Dual power source mode)Operating Power3.7V 2800mAh Rechargeable BatteryBackup Battery150mA,retain ... axis, and across operating temperature range. CertificationCCC,CE GPS handheld computer