THE 893LM 3-Button Vizor 310/315/390 MHz Operates up to 3 LiftMaster garage door openers, gates operators, or MyQ-enabled light devices. Security+ 2.0 anti-theft technology. The code between the remote control and the door opener receiver changes with each use. Compatible ONLY with Security+2.0 LiftMaster garage door openers or gate operators. All Security+ 2.0 garage door openers have a yellow Learn button and two yellow antennas. Includes visor clip (29B137), battery (CR2032), and instructions. Size 3 1/2" long, 1 3/4" wide.