Features: Comes with 2 lines USB-plus. Upgraded two-section detachable self-contained cable welding-free charging treasure set. No soldering kit: 2 3.7V18650/18700/20700/21700 lithium batteries can be installed. Detachable welding-free mobile power supply. The nesting- material includes: power supply main board + power supply shells + spring iron sheet (battery not included). This model has anti-reverse protections (the battery will not burn if it is installed). Note: When installing multiple batteries with different positive and negative directions, the board will still be burnt out, so the same polarity must be used. Specifications: Material: plastics Size: approx 56x31x90mm/2x1.2x3.5-inch Standard: Micro-/Type-C(optional) USB input：5V/4.5A，9V/2A，12V/1.5A Type-C output：5V/3A，9V/2A，12V/1.5A Type-C input：5V/3A，9V/2A，12V/1.5A Package Includes: 1x DIY Power Bank Case Kit note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.