HSM 4 remote control from Hörmann. The Hörmann HSM 4 remote control operates at a frequency of 40.685 MHz and has a compact design with 4 buttons. It is compatible with all Hörmann garage door openers that also operate at a frequency of 40.685 MHz. However, Hörmann remote controls do not work with products from other manufacturers, even if they use the same frequency, due to different coding. Technical information on the Hörmann HSM 4 remote control, 40.685 MHz: Frequency: 40.685 MHz. 4 channels. Self-learning coding. Supplied with a 12V battery, type 23A. Dimensions (W x H x D in mm): 37 x 60 x 12. Temperature range: -20° C to +60° C. Range: approx. 20 metres. Black remote control holder with sun visor clip and black remote control holder for HS, HSM, HSS available as accessories. HomeLink compatible. Available as a spare part: key ring for HSM 4 and HSE 2 remote controls. Remote control for Hörmann garage doors with 4 buttons. The dark grey housing of the Hörmann HSM 4 remote control, 40.685 MHz, has four light grey buttons arranged in a circle. These buttons are recessed and do not protrude above the surface of the housing to prevent accidental triggering of a transmission signal. The light grey colour of the buttons is deliberate and indicates the transmission frequency of 40.685 MHz. Hörmann has assigned a specific colour to each different remote control frequency, making it easier to identify the correct transmitter type at a glance.