Features: 18650 batteries are not included in the package, you need to purchase separately. Can only use the 18650 battery of which positive electrode is flat top. Do not close the cover untill the test it is finished, it can not open again if closed. Made of high quality material, it is wear resistant and durable. Perfect for outdoor travel use. Specifications: Material:Plastic Color:Black Number of batteries: 3x18650 batteries Model: T801 Input: 5V 1A (Type-C Input) Output: 5V 1A (Dual USB Output) Package Includes: 1x Power Bank Case (Battery not include) note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.