Comprehensive Compatibility: This handheld transmitter is compatible with models RSC2-433, RSZ1-433, RSE2-433, RSE4-433, RS2-433, RS4-433, RSN2-433, RSM4-433, Liftronic 500, 700, 8000, and Portronic D2500, D5000, S4000 garage door openers. Exclusion List: This transmitter is not compatible with BS Series (RSC4-433-BS, RSZ1-433-BS), Liftronic 700 Series 2, or Liftronic 800 Series 2. Please verify your model before purchase to ensure compatibility. Robust and Functional Design: Operating at 433.92 MHz, this replacement transmitter features two buttons, each controlling one door independently. The metal base enhances durability, providing reliable performance. Color: Black. Material: Plastic. Package Contents: 3 x Garage Door Remote Control. Only the items listed 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.