This product is a relay-type high accuracy household voltage
stablizer.Using it can regulate the big range fluctuating voltage
into a general voltage output.An ideal stabilized power source for
modern household purpose.low power consummption.Safe and
reliable.Large range of stabilization Input voltage:AC*5V***0V or
**0V***0V With over current protector Output voltage:AC**0V*4%or
AC**0V*4% With display of output voltage It has **0V***0V input
voltage dialing switch