This is 5w series products, power supplies can be used to various elctric & electrical products conveniently and valuedly. They are according to the RoHS standard, with the specification like bellow:    
Universal input voltage: 90v-256v    
Frequency: 47-63 HZ    
onput voltage and current: 3.3V 2A; 4.2V 0.5A /1A; 7.1V 0.5A /1A; 5V 1A; 6V 0.5A; 12V 0.5A
Low ripple and noisy: Less than 1%    
Operating temp.: -10 to +50 degrees    
Effect: More than 70%    
Size: 75* 50 *32    
DC cord: 1.8 m (6 feets )