... for fifty to eighty meters wireless digital door chime,alarm bell,wireless door bell,wireless door chime,door bellFunctions of product:Modle AM-E01 ... music come up, you must be full of joy.This door bell can be installed at random the button can be ... fixed or pasted . It is applcable in Bedroom,Office,Restaurant,Factory , Dormitory or any other place where need help. You won ...