Check the listing for details. 891LM LiftMaster 1 Button Remote Transmitter Garage Security+ 2.0 myQ 950ESTD. Color: Black, Condition: New. Listed at 19.95 USD. LiftMaster 891LM 1 Button Garage Door Opener Remote Control Product Description:LiftMaster model 891LM is a one button visor garage door or gate opener remote control that is compatible with LiftMaster, Chamberlain, Sears Craftsman and other openers manufactured by Chamberlain Corporation that use the new Security+ 2.0, MyQ or Assure Link controls manufactured since 2011 with a yellow learn button. These Security+ 2.0 remotes transmit on three frequencies 310, 315, 390MHz at the same time to give better range over the standard single frequency remotes. The Security+ 2.0 remote also uses rolling code technology for extra security. This item is new in box and includes visor clip, battery and programming instructions. Product Features: Activates one Security+2.0, MyQ, Assure Link device Compact design LED indicator used for battery strength and transmitting signal Visor clip Included One-Year manufactures warranty Product Specifications: Power: 3 volt lithium battery CR2032 (included) Frequency: Tri-frequency 310, 390 and 315MHz Codes: Features rolling code technology