Hand transmitter Dickert MAHS433-01 with 1 channel.
NOTE: The MAHS433-01 transmitter with purple push button and yellow LED works at 433.92MHz. If you have a variant with a green LED light and it contains a micro switch (DIP-10), then you must have the FHS10-01. There are also hand transmitters with a different color push button (red / blue / orange) and different color LED lights, but all are NOT interchangeable.
Programming: 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.