Features: LCD digital display, convenient for you to monitor the real-time battery bank capacity. Can be installed 10x18650 lithium battery. Fast charging, plug and play, long charging time. Mini portable design, convenience to carry. Light weight design is very easy to carry. for 99% USB devices, such as for smartphones, tablets, computers and so on. Function: temperature protections,Shortcircuit protections,Over current protections,Over voltages protections,Battery overshoot protections. DIY design, easy and convenient to use. Perfect for outdoor travel use. Specifications: Item Type: Mobile Power Case Input: 5V 2A Output: USB 5V1A/2A Battery: 10x18650(not included) Material: Plastic Size: 220x79x23mm/6.7x3.1x0.9in Color: White, Black Quantity: 1Pc Package Includes: 1 Piece 18650 Battery Case note: 18650 batteries not included in the package, you need to purchase separately. Can only use the 18650 battery of which positive electrode is flat top.