The remote control DELTRON S405-4 40.685 MHz has since been replaced by a remote control DICKERT MAHS40-04 perfectly compatible and with the same frequency.
Brand: DICKERT Model:MAHS40-04 Frequency: 40.685 MHz Price:£40.00 inc. vat
Please note: please open up the remote control and verify that the frequency written on the quartz inside is 40.685 MHz. If 27.015 MHz is written inside, then please choose the MAHS27-04. If your remote control has a frequency of 27.045 MHz, then there is no replacement for it. You will need to install an upgrade kit.