Application: for Smart 12V DIY mini ups box widely use for fingerprint attendance machine, fire safety system, security monitoring system, wireless camera, CCTV camera, system,Door security system, data assistant, emergency lighting, Alarm system, communication systems, radio, digital cameras, camcorders, video camera and more 5V 9V 12V devices. As USB powerbank for Cellphone Tablet and more devices,3in1 design,easy to use. Input 5.5x2.1mm port is for DC 12-13V 2A,5.5x2.1mm port output is for DC 12V 2Amax,5.5x2.1mm port output is for DC 9V 1A,USB output is 5V2A,Suitable for wifi Router LED Strip CCTV Camera and more 5V 9V 12V device. The first you need to install the 18650 battery,then the button on the back of the circuit board to activate the use of this product,with on off power easy to use. Different batches may have different appearances, but not affect the use Power Supply: 6pcs 18650 lithium batteries(without battery) Colour:Black Material:ABS Package Contents: 1 x DIY Box(18650 batteries are not included) 1 x DC cable 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.