... USA usb power adaptor is hot-selling in Amrican,even all over the world. 2.The usa adaptor is with CE UL GS ... : 1. Input: 100V-240V 50/60Hz; 2. Input fluctuation range: 90V-264V, 47Hz-63Hz; 3. Output power: 6W; 4. Output error: <± 5 ... protection, anti-start impact, anti-electronic jamming12.the power adaptor is with CE UL GS ROHS CCC FCC approval13.the quality of ...