Remote Control Dickert MAHS27-01 with 1 channel.
NOTE: The MAHS27-01 transmitter with orange push button and red LED light operates at 27.015 MHz. If you have a version on 27.045MHz, there is no Dickert replacement and your receiver must be exchanged or use a duplicator.There is also a Dickert MAHS40-01 with red push button and red LED light that looks very similar . However, it works at 40.685MHz and is not compatible. There are also hand transmitters with a different color push button (red / blue / purple) and different color LED lights, but they are all NOT interchangeable.
Do you have a variant with a green LED light and if there is a micro switch (DIP-10) in it, you must have the FHS10-01.
Set the microswitches on the inside (DIP-10) to match an already functioning handheld transmitter . No working handheld transmitter? Then align them with the microswitches on the receiver / drive.