... light turns on 3, OEM is welcome Led Christmas tree pocket card light ,led card light ,flashing led ... also called porcket light ) is an amazing creativity and general is as thin as cardit card,the bolds ... middle buld shape can engrave up tur up,and then the botton if the LED will light ... usage: advertising,lighting,accessories,pendants,gifts,brand marketing,and etc.can have your own logo,trademark on it ...