20000mAh Power Bank: High Capacity to charge an iPhone 7 6 times, a Samsung S7 5 times or an iPad Mini 3 2 times. Fast Charging: 3.6A Output with 2 USB Ports. Auto detects and changes its charging speed according to your device for fastest charging speed up to 2.4A (2 times faster than a computer USB port). Charging 2 devices simultaneously. One pack for all uses: Portable charger pack with 4.8A output wall charger and two usb cables. You dont have to spend extra money to buy other accessories. Safety Protection: Certified by CE, ROHS, and FCC, providing safety guarantee and effectively preventing your devices from overcharging, overheating, overcurrent and short circuits. 12-month WARRANTY : This power bank is made of high quality materials and top-grade chip and battery. Safe to use. Also, Tiergrade manufacture provide a 12-month WARRANTY Service.