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 remote. Compatible with 2211-L and 2211-L(TX) Garage Door Opener Remote. 2-button keychain remote controls up to two garage door openers. Designed to minimize power consumption for long battery life. Enhanced security - Replacement Garage Door Remote Transmitter utilizes 303MHz rolling code technology, ensuring a range of up to approximately 120 feet, minimizing radio wave interference and increasing security. Before starting remote programming, ensure the garage door opener is fully closed. Color: Black Material: Plastic Package Contents: 3x Garage Door Remote (with 1x 23A 12V dry battery) Only the above package content; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.