This is the direct replacement for the Skylink 68 which has been discontinued The world's smallest universal remote. The remote is 2"" by 1"" and includes the keyring. Prevent break-in to car and house. Enhanced security & protection. Ideal for convertibles, motorcycles and bicycles. Operating range of 100 feet and more. One year warranty, 12V alkaline battery included. This remote does not cover intellicode or rolling code technology, DIP SWITCH STYLE ONLY! check compatibility chart below. Compatibility Chart for the Skylink 66 universal garage door opener Brands Manuf. Year Frequency Stanley ® 1976-1997 300MHz/310MHz Multi-Code ® 1976-1997 300MHz/310MHz Linear ® 1975-1997 310MHz Moore-O-Matic ® 1983-1997 310MHz Chamberlain ® 1983-1997 390MHz Sears ® 1983-1997 390MHz Lift-Master ® 1983-1997 390MHz Wayne Dalton ® 1983-1997 300MHz/390MHz Master Mechanic ® 1983-1997 390MHz Genie ® 1983-1997 390MHz Martec ® / Teckey ® 1992-1999 300MHz Unknown** Unknown** Unknown**