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 868.3 MHz with a black backside, ensuring compatibility with Marantec Digital 868.3 MHz remotes. Note: It is not compatible with 433 MHz 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 feature provides a convenient solution for multiple garage setups. Note: Product appearance and printed text may vary slightly between batches, but this does not affect functionality. Color: As shown Material: Plastic Package Contents: 3 x Garage door remotes