Enhanced Compatibility: This replacement transmitter is compatible with a wide range of models including D302-868, D304-868, D222-868, D313-868, D321-868, D323-868, D382-868, D384-868, D392-868, ensuring seamless operation with these specific models. Frequency Specific: This remote operates at a frequency of 868.3MHz with a black backside, ensuring compatibility with 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 a separate channel, allowing independent control of up to two garage doors. This provides a convenient solution for homes with multiple garage doors. Color: As shown in photo Material: Plastic Package Contents: 2 x Garage door remotes Note: Light reflection and different display settings may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3cm.