This glasses model is TDG-BT400A with TDG-BT500A package box , exactly the same as TDG-BT500A .
because TDG-BT400A come with TV together , and TDG-BT500A is for resale , in order to distinguish them from different sales channel , Sony name them with 2 model number for their convenience , but they are exactly the same .
this only works for :
US:KDL-46W900A / KDL-55W900A / KDL-65W850A / XBR-55X850A / XBR-65X850A
AU:KDL-46W900A / KDL-55W900A / KDL-65W850A / KD-55X8504A / KD-65X8504A
UK:KDL-40W905A / KDL-46W905A / KDL-55W905A / KDL-65W855A
DE:KDL-40W905A / KDL-46W905A / KDL-55W905A / KDL-65W855A
this doesn't work for 2010~2012 Sony TV !