Good quality Competitive price In-time service FeaturesKey Features• Built-in filter, anti-interference ability• High efficiency, low power consumption ... reading machines, e-books, digital photo frame, electronic tools, high-definition player, electric toys, advertising machine, air purifier, ... noise100mVp-pInsulation ResistanceDC500V 100M Ω(min)MTBF>20000Hrs USB 5W Power adapter UL SFN050100-US