:1 Xmas LED knit hats InstructionStep one: Inside the seam of the hat there is a hidden switch. Turn the switch to the on position. Step two: Press the on/off button to activate the lights.You have to take the battery compartment out of its little pocket to spot the little switch to flip to activate the flashing lights.2 Attention before turn on the Christmas bulb necklace:Pull little clear plastic out of square box then push button to turn on & offChristmas LED Light UP Beanie Hat feature:-Colorful LED flashlight contained-Two ways of lighting, slowly flash and then flash quickly- Warm and comfortable winter knit cap hat.- Stretch to sizes,one size fit all.- Perfect gift for family ,friend at Christmas, Halloween, New Year, Birthday, Music Festival Party.Package includes:1pack xLED Light-up Knitted Ugly Sweater Holiday Xmas Christmas Beanie1pack xChristmas bulb lighted necklaces