Usage Tips: Comprehensive Compatibility: This handheld transmitter is designed for and compatible with models RSC2-433, RSZ1-433, RSE2-433, RSE4-433, RS2-433, RS4-433, RSN2-433, RSM4-433, as well as Liftronic 500, 700, 8000, and Portronic D2500, D5000, S4000 garage door openers. Exclusion List: Please note that this transmitter is not compatible with BS Series (RSC4-433-BS, RSZ1-433-BS), Liftronic 700 Series 2, or Liftronic 800 Series 2. Verify your model before purchase to avoid inconvenience. Robust and Functional Design: Operating at 433.92 MHz, this replacement transmitter features two buttons, each controlling one door independently. The metal opening at the bottom enhances durability, providing reliable performance. Color: Black Material: Plastic Package Contents: 3 x Garage Door Remote Control Only the items listed above are included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.