Double-side transparent mirror Super highly bright LED light tube, frequent glistening or constant bright. Two 1.5V AAA batteries characteristics light sourcing :super highly bright light diode Flash frequency: 65/m Error frequency: 5??light color: yellow/red/amber Voltage: 3V Power consumption: (0.05W) Visible distance: 250-300m Two 1.5V AAA alka batteries, can shining 200-500 hours continuous flickering Flash shade:it automatically shuts off during the daytime, and automatically flashes at night.