ITEM NAME:DIY 5V 2.1A 3 USB Power Bank Battery Charger Module Circuit Board Step Up Boost 100% brand new and high quality. Apply Battery Type: 18650 battery(not include) Output Voltage: 5V 2.1A Input Voltage: 5V 1A Instructions: Level 4 Capacity indicator Lighting: with LED lights Rated Voltage: 3.7V ( Suit for 3.2V-4.2V. The batteries are in parallel) Specifications: Material: Electronic components Color: shown as pictures Size: 62×18×8mm/2.44×0.71×0.31in Quantity: 1 PC 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.(Instructions: Level 4 Capacity indicator. 1 X 3-Port USB Circuit Board. The batteries are in parallel). Apply Battery Type: 18650 battery(not include). Also note that monitor settings may vary from computer to computer and may distort actual colors.