Definitely not even close to 30000 mAh, probally closer to 6000. It will charge my tablet basically 1:1. The power bank was charged 100% my tablet was at 15%, after charging the tablet to 100% the bank was at 15% left. I literally laughed out loud when I seen 15% left. Too perfect.
The images are treated in Photoshop and deceive about the quality of finish. Unpleasant to the touch made of weak plastic and with poor finish But with an acceptable price-quality ratio.