The box has been opened after purchase, but the item is unused. Simultaneous Charging of 3 Devices: Two USB-C ports supporting USB PD can output up to 65W, allowing you to charge two USB-C devices simultaneously. You can also charge three devices at the same time by using the USB-A port. *When using two ports, USB-C1 provides 45W and USB-C2 provides 20W charging. Rapid Charging of the Power Bank: The power bank can be rapidly charged at 30W, fully charging in 3.5 hours. Wide Compatibility: Supports USB PD and can rapidly charge a wide range of devices, such as smartphones and tablets. Ultra-High Capacity and Powerful: With an ultra-high capacity of 24000mAh, it can charge an iPhone 15 about 5 times and a MacBook Pro 13-inch more than once.