2.  5v 2A  AC/DC power adapter Spec. as following:

 

Input Rated Voltage                    *6Vac~**4Vac
Input Frequency Range                *7Hz~*3Hz
Input Current                               0.5A(Max)
Input Inrush Current                    *0A
Efficiency                                      *0%(MIN)at Rated Voltage         
DC Output Voltage                       5V± 5%  (option)
DC Output Current                       ***0mA    (option)
DC Output Power                         *0w
Ripple and Noise                         ≤**0Mv at full road with *0MHz bandwidth
Turn On Delay Time                    ≤3S  (AC:**0V and full load)
Certificates                                  CE GS UL/CUL FCC ROHS
Dielectric Voltage                        A IEC**0 three pin input**-output(FG)***0Vac one minute
Safety protection :                      short current protection ,over voltage and current protection
Leakage Current .                       ≤5mA
DC connector                             optional
DC cable                                     optional
Operating Temperature              0°C***-**5°C
Storage Temperature                 **0°C***-**5°C