Charge Faster, Charge Smarter Automatically detects and delivers the best possible charging current for any connected device - ensuring the fastest, most efficient charge. Most Powerful in compact size: 4 USB - Ports with the power output of 4.2 Amp. Can charge smart phones simultaneously & rapidly. Perfect Mobile Companion: Compact design allows the user to keep handy in bag and carry around with utmost ease. In addition to this, exemplary ABS housing offers durable user experience and protects it from any scratches.