... feature: 1,GPS tracker with waterproofshell 2,build-in shock sensor 3, large capacity battery Product Description: Model: GPS104This tracker is ... and GSM antenna to make it can be used alone without installation, convenient and quick.Support external GSM antenna, GPS ... and Resume8,Active and deactive DOOR ALARM, ACC ALARM, SENSOR ALARM by remote control9,tracking function by timing and frequency10 ...