31v

Energy efficient: comes with 500 leds but the total power is only 6W. No worry about energy waste.
Memory Function: The controller is designed to remember the last setting after cutting off the power. No need to set the light again.Easy to use: directly plug in and unplug it for power on and off
8 modes for choosing: combination, in waves, sequential, slogs , chasing/flash, slow fade, twinkle/flash, and steady on.High brightness: 500 LED lights brighten up the happiness atmosphere inside or outside.The low voltage power adapter passes with UL and CSA certification.