1.Its convenient use your PDA charge in the house USB outlet can use for other digital machine such as mobile-phone,MP3,MP4,camera ect 2.LED indicate show the house charger on working 3.Hi-Pot test (Dielectric withstand voltage): Primary to secondary: 3.0KVac 5mA for 5S 4.The Line side of the input shall have a fuse 5.Input Voltages: 100 - 240Vac / Frequency: 50Hz / 60Hz / Input Current: 0.4A (MAX) 6.Short Circuit Protection (Auto recovery) and Open Circuit Protection 7.Over Voltage Protection (Latch off)