The 390LMPB1V Garage Door Opener works on a frequency of 390 MHz Billion-Code compatible and uses a long-life 12-volt battery. A test/operated LED light feature is included, and the package comes with a black case and a visor clip. New Part# 390LMPB1V2 Alternate Part# SU7390LMPB1V Compatible with most *green learn button* Chamberlain, LiftMaster (81LM and others), Access Master and Steelcraft receivers and transmitters BillionCode-Rolling Code Technology; digital code compatible Runs on 390mhz Uses 12V A23 Battery Black Case, Yellow Button