Features: A DIY power back case, without battery, can charge 4pcs 21700 batteries (Batteries not included) Support full protocol fast charging 22.5W, two-way PD fast charging 20W. Support micro and type c input, type-c usb output and multi-protocol fast charging for laptop phone You can take it on the plane without declaration, safe and reliable Transparent body, imported high-quality LED screen can check the remaining power in real-time Specifications: Item:for 4pcs 21700 Battery Charger Box Material: ABS-PVC Color: Gray/Yellow/Blue Size: approx 154x65x29MM MIcro Input: 5V 2A/ 9V 2A /12V 1.5A TypeC Input: 5V 3A/ 9V 2A /12V 1.5A TypeC Output:5V 3A 9V 2.2A 12V 1.6A USB Output: 5V3A /4.5V5A/ 9V 2A /12V 1.5A Output: 5 5V/2.1A/ PD22.5W Quantity: 1 PC (Not includes the battery and charging cable) 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 bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 PC x Charging Case