433.92MHz Grey Back Only: Make sure your original remote works at 433.92MHz and has a grey back. NOT compatible with Digital 868MHz with black back. NOT compatible with Bi-Linked series. Compatibility List: This is a replacement for 433.92MHz Multi-Bit remote controls. Compatible with Digital 302 or 304 or 306 or 313 or 317 or 318 or 321 or 323 or 382 or 384 or 392 or 394 433MHz. Compatible with 131 or 132 or 222 or 231 433MHz List of compatible garage door opener receivers: Our remote control only works with garage door opener receivers that operate at a frequency of 433.92MHz Multi-bit. Compatible with Comfort 50 or 51 or 60 or 211 or 220 or 220.2 or 250 or 250.2 or 252 or 252.2 or 500 or 510 or 520 or 580 or 800 or 820 or 830 or 850 or 851 or 870 Warm Tips: This garage door remote control is a replacement and not an original accessory. We recommend that you check the compatibility of the devices using the list below before purchasing Material: Plastic Color: As shown Package Contents: 2 x Remote controller 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.