The Sdre-HSM4 868 MHZ remote control (not original Hormann HSM4 868) is ideal as a replacement remote control. It has 4 blue buttons and works on a radio frequency of 868 MHz. The Sdre-HSM4 HSM4 868 MHZ remote control can replace the following transmitters: Hormann HSM4 868Mhz, Hormann HS4 868 MHz, Hormann HSM2, Hormann HSP4 868, Hormann HS1 868, Tubauto HSM4 868 MHz, Tubauto HS4 868 MHz DOES NOT work with Hormann Bisecur HSE1 HSE2 HSE4 868 BS HS1 HS4 HS5 HSS4 HSP4 HSD2 Remote control marked “BS” This remote control is programmed via self-learning directly into the receiver located near the motor or motorization of the garage door or gate. To program this remote control you need to access the receiver, you can also do this from a remote control already installed. programmed. This remote control uses the 868 MHz radio frequency and has blue buttons. Therefore, do not confuse this remote control with the one with gray buttons.