... cable.Card Slot & Built-In Dual Lithium BatteryEmbedded GPRS/CDMA communication module, easy-operated.Built-in dual lithium battery ... transmitting speed, less power loss and more stableMature GPRS/CDMA Technology Completely built-in GPRS modulewithout big battery, no ... navigation.Card Slot & Built-In Dual Lithium BatteryEmbedded GPRS/CDMA communication module, easy-operated.Built-in dual lithium battery ...