WAPK M1 Portable Battery (Cable Gift Included)

WAPIK M1 Mobile Battery
(Comes with a FREE TYPE-C Cable)

・20000mAh High Capacity, 22.5W
・Color: Black
・Battery Type: Polymer Battery
・4-Port Fast Charging
・Charge 5 Devices Simultaneously
・3 Built-in Cables
　(TYPE-C, Lightning, Micro-USB)
・LED Power Indicator
・Portable Mobile Battery for Easy Carrying
・Compatible Devices: iPhone/Android Compatible
・Lightweight
・PSE Certified, Carry-on Allowed on Flights
・Ideal for Travel, Business Trips, Earthquake Preparedness, Power Outages, Disaster Prevention
・Japanese Manual Included
・Retail Price: ¥5199 (Tax Included)

Thank you for looking.
I impulsively bought two during a sale, but realized I don't need one, so I'm listing it for sale.
It's in the same condition as when it arrived, but I opened the box once to check the contents. The protective plastic is still on the LED indicator. It arrived with 84% charge.
As it has been opened from the box, please refrain from purchasing if you are sensitive about such details.