Features: UItra-High Capacity 12000mAh. UItra-Compact:Same power, half size,unmatched {url removed} is slim as a bank card,your best choice for your pocket. UItra-Light:It adopts the Polymer Battery(the safest battery type so far),20% the size and and 30% the weight of other batteries,no burden for you. UItra-Thin, fashion design, portable, suitable for outdoor use, for travelling, etc. It's very safe to charge. Specifications: Model: Z19 Color: Silver Size: 134*67*15mm Weight: 228g Capacity: 12000mAh Power: 37W Input: 5V/2.0A Output VSMART: 5V/2.4A Material: Two-color alumina alloy Package includes: 1* Power bank Note: According to different conditions, Battery capacity can be divided into actual capacity, theoretical capacity, also called rated capacity. Battery capacity refers to the battery storage capacity. The unit is "mAh", 1Ah = 1000mAh, so there are some differences between rated capacity and actual capacity in Li-ion Battery. It is normal and reasonable. Item Specifics Standard null Connectivity Dual USB Number of Ports2 ColorMulticolorMaterialTwo-color alumina alloyFeaturesAnti-Slip Dustproof