Product parameters: 【Size】 【75mm * 38mm * 38mm Weight 25 g] [Color] White / Black optional Product Material fire-rated construction materials [material] LED digital screen, digital display [protection] defense overload, anti-overvoltage, short circuit proof, anti-high temperature and current limit protection [supply] support wide voltage, DC 12V ~ 24V [charging interface] 2 standard USB output interface, a wide range of applications [Output Voltage] DC 5V [Output Current ] 1A / 2.1A, 3.1A total work [remind] screen that lights up in working condition, the display battery voltage value [scope] charging mobile phones, tablet computers, digital cameras, DV, tachograph, MP4 and others with USB interface device charging accessory package [* 1] host, certificate * [instructions] 1, the USB charging cable into a USB port 2 on the product, the product into the car cigarette lighter, indicator lights when the product 3, and then the other end of the USB cable, and digital products connected to start charging 4, after charging is complete, unplug the device from the cigarette lighter car charger [Note] ● Do not hotter, cooler and humid environment ● Do not use this product in the car charger stored in humid or high temperature environments ● ● product away from children after being charged should be promptly allocate various types of digital products plug ● Battery differences exist, so the charging time is inconsistent