gps personal locator, small, waterproof, long standby, sos, alarm, voice monitor Applications: ... outdoor machines; Prevention against criminals. Key Features: SiRF StarIII GPS chipsets and GSM900/1800MHz module; Internal antennas; Compact size; ... ; TCP/UDP protocol; Internal li-ion battery. Specifications:GPS ChipsetSiRF StarIII or MTKGSM ModuleGSM 900/1800MHzGPRS ProtocolTCP/UDPPosition Accuracy5 ...