Improved 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, D392-868. Ensure seamless operation with these specific models. Frequency Specific: This remote control operates on a frequency of 868.3 MHz with a black back, ensuring it is compatible with your Marantec Digital 868.3 MHz remote control. Note: It is not compatible with models with a 433 MHz frequency that have a light gray back. Dual Door Control: Each of the two buttons on the remote control corresponds to an independent channel, allowing you to control up to two garage doors separately. This feature provides a convenient solution for multi-door garage installations. Color: Photo Color Material: plastic Package Contents: 2 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.