... UDP), SMS Support ·OTA, upgrade the firmware via GPRS ·Backup battery, Send a data every minute,support 12 hours working ... AVL03, TZ-AVL05 Specifications: Dimension96mm*65mm*25mmN.W0.24KGExterior Power SupplyDC9V-36VInner Lithium batteryDC 3.7V-4.2VExterior GSM ... /1800/1900 Mhz)GPS chipsuper sensitivity and high accuracyLED3LEDs indicate power, GSM, GPS signal, and trembling status( 2 Changer ...