Warm Notes:The sublimation led acrylic keychains without battery,please purchase the CR2025L 3V lithium battery by yourself. Specification:The sublimation led keychains are ovel glitter 2.6" x 1.9",1/6" Thick(4 mm) ,12 pieces sublimation acrylic blanks sheets and 12 pieces key rings with light packing with one big brown box.It can light up for red,green,blue,yellow,mint,pink,white,slow flash and fast flash.Just press the bottom then can change it.Long press the bottom then can turn off the light. Premium Sublimation Coating:The led acrylic keychains are ready for sublimation by heat press machine the print color come out bright not foggy. Easy to Print:We suggest setting 356 F,60 S for heat transfer by heat press machine.The sublimation blanks glitter side is for printing.When printing the design on sublimation paper,we suggest mirror it.The printed designs will show more clearly.If you like the hazy feeling,then no need mirror the printed designs. Perfectly Customized Gifts:The sublimation light up blanks keychains can print ANY photo,designs you want.It'll be a nice gifts for graduation gfits,birthday gifts,wedding gifts,holiday gifts and christmas gifts.