Usage Tips:Comprehensive Compatibility: This handheld transmitter is designed for and is compatible with models RSC2-433, RSZ1-433, RSE2-433, RSE4-433, RS2-433, RS4-433, RSN2-433, RSM4-433, and for Liftronic 500, 700, 8000, as well as Portronic D2500, D5000, S4000 garage door openers. Exclusion List: Please note that this transmitter is not compatible with for BS Series (RSC4-433-BS, RSZ1-433-BS) and for Liftronic 700 Series 2, for Liftronic 800 Series 2. your model is compatible before purchase to avoid any inconvenience. Robust and Functional Design: Operating at 433.92 MHz, this replacement transmitter features two buttons, each controlling one door independently. Its metal opening at the bottom enhances robustness, making it a reliable choice. Color: Black Material: plastic Package Contents: 3 x Garage Door Remote Control 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.