... Services Fleet Management: car, taxi, bus, truck etc. Description:Internal Polymer Lithium Ion Battery in the AVL Support mini USB port to ... (optional) Specifications:FeatureCharacteristicsDimension108mm*58mm*28mmN.W140gExterior Power SupplyDC 12V – 24VInner lithium batteryDC 3.7VStandby timeAbout 72 hoursWork timeAbout 12 hoursExterior GSM ...