["Description:\n\nFeatures:\nbrand new and high quality.\nThe first use needs to be activated by charging with 12V power supply\nWithout 18650 battery,You need to prepare 3x 18650 batteries yourself to use.\nfor DC 5.5x2.1mm interface input or output functions,with for DC adapter and power switch,weasy to use.\nfor DC 5.5x2.1mm port for 12V LED Light WiFi Router for smart Speaker or more devices.\nLithium battery for protection circuit, overcharge, low voltage, overload, short circuit for protection\n\n\nSpecification:\nMaterial:Plastic+metal\nColor:Black\nInput Voltage:DC 12V\nOutput Voltage: for DC 12V Positive inside, negative outside\nSize:9.3x6.6x2.7cm\n18650 Batteries are not Included\n\nNote\nPlease put in battery in a right way.\n\nPacking list:\n1x 18650 battery box for case."]