It is NOT compatible with Marantec Digital 433MHz systems. Frequency: 868MHz, 4button handheld transmitter. Confirm your current remote operates at 868MHz (not 433MHz). Compatible devices Compatible with Marantec Digital 868Mhz 304 / 384 / 302 / 313 / 321 / 323 / 131 868 Transmitter.
eBay