This is the GP Portable PowerBank 5200 mAh [GP-FN05MS] Safer Over-temperature cut-off during PowerBank recharging Complies with UN38.3 air transport safety standard Faster 2.1A charging speed Longer Battery Life Under-temperature protection to prolong battery life Over-charging and discharging protection Overload protection More Durable Short circuit protection Loopback protection -auto cut-off when cable is plugged into input/output simultaneously Easier to Use Intelligent automatic power modulation switch for various input voltage, tailor-made for travelling use Compatible with iOS and Android smartphones, tablet PCs and many other USB devices Smarter Design Matt aluminium casing Stabilizing design Smart LED indication ...Contact us if you need more help.