device that held barely 3 months !!! I changed the battery error message "oL" I contacted the manufacturer in Germany and no answer on the net sav no answer !!! Product warranty 5 years yet !! Product avoided, fortunately amazon is there to repay us !! Today I no longer trust at all scales, Electronic (my 3 rd) therefore I refocused to mechanical person weighs the REAL as EKS 8709 or 40461 MEDISANA (I ordered) c is the material used by health professionals so reliable products more expensive but better !!!