Type:Battery Storage Box Note:Without Battery Specification:A:Normal version: Max Output 5V-2A. OR B:PD Charge Version: Max Output 5V-3A/9V-2A/12V-1.5A/5V-4.5A (You can't choose the voltage which you want, our product can adjust the best voltage to you.). OR C:PD Charge + Wireless Version: Max Output 5V-3A/9V-2A/12V-1.5A/5V-4.5A Integrated QC2.0/QC3.0 output fast charging protocol Integrated FCP (for Huawei High Voltage Fast Charge Protocol) input/output fast charge protocol Integrated AFC (for Samsung Fast Charge Protocol) Input/Output Fast Charge Protocol Integrated SFCP (for Spreadtrum Fast Charge Protocol) Input/Output Fast Charge Protocol Integrate MTK PE+ 1.1&2.0 (for MediaTek fast charge protocol) output fast charge protocol Integrated USB C DRP protocol, support input and output fast charge Compatible with BC1.2, for Apple, for Samsung mobile phone fast charge Integrated USB Power Delivery (PD2.0/PD3.0) protocol The battery cannot be used if its outer skin is . Pointed batteries cannot be used, only flat batteries can be used. The voltage is in line with 3.2V-4.2V The positive and negative poles need to be placed and used correctly. Do not use or install in a high temperature environment. Our product is suit for Mobile phones, if you use other device, like light trips, it will not work because of incompatible chip. The batteries should be charge fully when you use our product first time. Maximum power is for reference. You can't choose the voltage which you want, our product can adjust the best voltage to your phone. Color: Black Material: plastic Package Contents: 1 x Power Bank Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.