Description: OOTDTY Features: The first time you need to install the 18650 battery, press the button on the back of the circuit board to activate the use of this product. Need to use your own flat head 18650 batteries,can not fit 18650 Pointed battery. Fast Charging: With a quick QC 3.0 port, it enables you to get a quick top off on your QC 3.0-enabled mobile phones. 5.5x2.1mm port output is DC 1-24V Adjustable ,Suitable for charge Laptop wifi Router LED Strip CCTV Camera and more. High-precision stepless voltage regulation, accuracy of 0.1V, will not change after adjusting the voltage, no need to reset every time you turn on. Laptop Connector Type: 7.9x5.4mm/7.4x5.0mm/square/4.5x3.0mm/6.0x4.0mm/5.5x2.5mm/4.8x1.7mm /5.0x3.0mm/4.0x1.7mm/2.5x0.7mm/5.5x1.7mm Specifications: Item Type: 18650 Li-ion Battery Charger Box Material: metal Color: Back Size: 18.6x12.4x2.7cm 5.5x2.1mm cable Length: 100cm input: DC 16V-24V 5.5x2.1mm port output: DC 1V-24V Adjustable USB Output: 5V 3A,9V 2A,12V 1.5A Battery: 12pcs 18650 Flat head lithium battery (Not included) Quantity: 1 set (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 X DIY Power Bank Box(18650 batteries are not included) 1 X 5.5x2.5mm to 5.5x2.1mm cable 1 X DC adapter 11 X Laptop adapter