Small; looks trendy; and charges from USB extremely poorly, in that order! First test: 5 USB (charged for 8 hours), iPad mini (depleted to 0%), iPad 4, Huawei phone (charged for 64% of capacity), and 2 glo (nearly fully discharged). The hyawei and one glo were actually charged. Glo increased one notch, iPad mini increased to 63%, and iPad 4 increased to 76%. Second test: iPhone XR (discharged to 23%), Interstep wireless speaker, JBL and Sony wireless headphones (discharged to zero), Bose SoundLink Color wireless speaker (discharged to zero). The headphones did not appear to be fully charged, and the speakers were only 55% charged on the iPhone. In other words, while the gadget will function as the standard light charge that powers your devices all day, it is completely inappropriate as a full-fledged charging replacement.