Detailed Product Description Our company is majoring in the Gps tracker.Gps tracker ,AVL,GSM/GPRS tracking device,mini tracker,real ... child, the elderly, pet, asset, vehicle etc.With superior GPS and GPRS modules, GT30 has good sensitivity and stable performance ... -fencing controlLow battery alertSpeeding alertAlert when GT30 enters/exits GPS blind areaAlert when GT30 is turned onThree buttons for ...