Instructional Video - How to change battery - Specifications: Transmitter: AM Transmission Transmitter Frequency: 433. MHz Rolling code New code every use - over 100 billion code to choose from Power supply: 10A20 (3) battery Batteries and Instructions Included Dimensions: CLOSE6.31W x 11.83L x 2.88D cm : OPEN6.31W x 19.64L x 2.88D cm Suits Models: CR625EVO (Chamberlain Handy - Lift Plus 2.0) CR655MYQ (Chamberlain Rollerlift) CS60EVO (Chamberlain Powerlift) CS100EVO (Chamberlain Powerlift Plus) MJ3800MYQ (Commander Ultimate) MR550EVO (Weatherdrive) MR650EVO(Silent Drive) MR655EVO (Quietdrive Pro) MR655MYQ (Silentdrive Essential) MR850EVO (Silent Drive) MR855EVO (Silentdrive Pro) MR855MYQ (Silentdrive Elite) MS65MYQ (Commander Essential) MS105MYQ (Commander Elite) MS125MYQ (Commander Extreme) MT3850EVO (Whisperdrive) MT100EVO (Tiltmaster) MT110MYQ (Commander my - Q) MT120EVOPS (Cyclone - Pro) MT50EVO (Entry - Lift) MT60EVO (Powerace) MRC950EVO (Overdrive) ST50EVOB (Steel-Line) ST50EVOB1 (Steel-Line) ST50EVOC (Steel-Line) E945 (Remote) E943 (Remote) E950M (Remote) Keypad - Includes: Free Battery Free Coding Instructions