The Sdre-HSM4 868 MHZ Remote Control (Not Original Hormann HSM4 868) is ideal for replacement remote control. It has 4 blue buttons and operates on a radio frequency of 868 MHz. The HSM4 HSM4 868 MHZ remote control is able to 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 DO 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 by self-learning directly in the receiver located near the motor or motorization of your garage door or gate. To program this remote control you must access the receiver, you can also do it from an already programmed remote control. This remote control uses the 868 mhz radio frequency and this one has blue buttons. Therefore, do not confuse this remote control with the one with gray buttons. Note: The data are all measured manually, please allow an error