For 4 devices during your trip: 2x USB output, 1 USB C and wireless charging B> Lithium-polymer cells provide a capacity of up to 15,000 mAh what mean you can charge the device several times. The housing of the device is solid, resistant to high temperatures and drops. Purideda ProX is safe for your devices, protects against overvoltages and surges. Specification b>: Battery: Lithium-polymer battery Capacity: 15,000 mAh Output: USB A 5V-3A 9V-2A, 12V-1.5A Output: USB B 5V- 2.4A Input: Micro USB 5V-2.1A, 9V-2A Input: USB C 5V-2.1 A, 9V-2A Weight: 350 g Size: 153x76x26,1 mm Power indicator: electronic display Battery life cycle: 500 NOTE! Nominal capacity expressed in mAh (milliampere hours) means the sum of all cells that were used in the power bank. The cells used have a voltage of 3.6 – 3.7V, while the standard USB port – 5V, so voltage conversion is necessary, which in turn translates into real capacity. After conversion, it is usually around 65-67% of the original value. This means that for a power bank with a capacity of 12,000 mAh, in fact about 8,000 mAh is available.