Brand The first use needs to be activated by charging with 12V power supply Without 18650 battery,You need to prepare 3x 18650 batteries yourself to use. DC 5.5x2.1mm interface input or output functions,with DC adapter and power switch,weasy to use. DC 5.5x2.1mm port for 12V LED Light WiFi Router smart Speaker or more devices. Lithium battery protection circuit, overcharge, low voltage, overload, short circuit protection.<br><br>Input Voltage:DC 12V Output Voltage: DC 12V Positive inside, negative outside NOTE: 18650 Batteries are not Included Colour:Black Material:ABS<br><br>Package Contents: 1 x DIY Box(18650 batteries are not included) 1 x DC cable<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.