This CW‑K81DX High‑capacity Mobile Power Supply Power Bank is built with PC+ABS material, dimension 153*55*34mm. It features a sleek vertical body with colorful digital screen, showing real‑time battery level and charging parameters. Type‑C1 supports bidirectional 100W input‑output, Type‑C2 supports bidirectional 60W input‑output. Equipped with four 21700 battery cells, it has capacity options:16000mAh,18000mAh,20000mAh. Three color selections: Black, Blue, Gray. It includes dual bidirectional Type‑C ports and one USB‑A output port, compatible with mainstream fast‑charge protocols. Multiple devices can be charged simultaneously. High‑power performance supports laptops, tablets and smartphones, suitable for business trips, travel and outdoor daily scenarios. Essential Details: Model: CW‑K81DX; Product Name: High‑capacity mobile power supply power bank; Battery:21700*4 (20000mAh); Material: PC+ABS; Size:153*55*34mm; Color: Black, Blue, Gray;Type‑C1 Input & Output:5V3A,9V3A,15V3A,20V5A; Type‑C2 Input & Output:5V3A,9V3A,15V3A,20V3A; USB1 Output:5V/3A,9V2A,12V1.5A,10V2.25A. Selling points:1. Premium PC+ABS vertical housing, streamlined appearance with multi‑color digital display panel;2. Type‑C1 supports max 100W bidirectional fast charge, capable of charging notebooks;3. Dual Type‑C ports both support input and output, flexible port usage;4. USB‑A port adapts multiple fast‑charge protocols for mobile phones;5. Multiple capacity versions 16000‑20000mAh, three classic color options;6. Multi‑port simultaneous output to power several gadgets at the same time. It passes CCC, RoHS, FC, CE certifications, perfect for travel, business outings and outdoor use.