Enhanced Compatibility: This replacement transmitter is compatible with a wide range of Marantec models including D302-868, D304-868, D222-868, D313-868, D321-868, D323-868, D382-868, D384-868, and D392-868. Ensure seamless operation with these specific models. Frequency Specific: This remote operates at a frequency of 868.3MHz with a black backside, ensuring compatibility with Marantec Digital 868.3 MHz remotes. It is not compatible with 433MHz frequency models that have a light grey back. Dual Door Control: Each of the two buttons on the remote corresponds to an independent channel, allowing control of up to two garage doors separately. This provides a convenient solution for multiple garage setups. Color: Photo Color Material: Plastic Package Contents: 2 x Garage door remotes Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.