The X-10 was developed as a result of the Government revision of Federal Specification FF-L-4720, now Rev. B. The X-10 was designed with similar features as the X-09 to minimize installation and user training issues. Like the X-09, the X-10 Dial Ring is Battleship Gray, with the same reduced view LCD. The dialing technique remains “Left- Right-Left”. The X-10 has the same three operating modes and programming method. The Lock Case and Dial Ring mounting locations are the same. The X-10 has similar audit features. The X-10 is a Self Powered – Green Technology Product.