2211-L Garage Door Opener Remote for 303MHz Dual Frequency Burst Garage Door Opener with Security Rolling Code Support. Ideal for multi-vehicle homes or as a replacement for lost or damaged remotes. Compatible with 2211-L and 2211-L(TX) garage door opener remotes. 2-button keychain remote controls up to two garage door openers. Designed to minimize power consumption for extended battery life. Enhanced security with rolling code technology at 303MHz, providing a range of up to approximately 120 feet, reducing radio wave interference and improving security. Ensure the garage door opener is fully closed before programming the remote. Color: Black Material: Plastic Package Contents: 3x Garage Door Remotes (each includes 1x 23A 12V dry battery) Note: Only the items listed are included. Note: Lighting reflections and display differences may cause slight variations in color appearance. Measurement error allowance is +/- 1-3 cm.