Slim Fast Charging Durable Portable Capacity Indicator Powerbank 4000mAh The slim power bank has fast charging. It is a durable and portable power with ultra-high capacity. Enough power to keep you going for days. Charge your iPhone up to 2 times with this portable power bank. Features: Fast charging, durable portable power Ultra-High Capacity Enough power to keep you going for days. Charge your iPhone up to 2 times with this portable power bank. Protection: Capacity indicator Short Circuit Protection Output Voltage Surge Protection Output Current Stabilizer Power Overload Protection Battery Cell Protection Low Voltage Protection Specification: Capacity: 500mAh (Li-Polymer) Input: DC 5V/2A Output: Two ports share 2.6A DC5V/1A DC 5V/2.1A (Max) Input charging time: 3-4 hours (full charge) Battery cell: Li-polymer Includes: Power Bank Micro USB Cable User Manual