North Shore Commercial Door NSCD-318PK1 Allstar Compatible Mini Remote 9 Dip Switches Long lasting 3 volt battery (Replace with part number CR2032) Compatible with GTO RB-741, Allstar 9931T, 9931MT, and more 3 year warranty DIMENSIONS: Width: 1 5/16" (just over 1 1/4") x Height: 2 1/4" x Depth: 1/2"