7 pin DIN plug to 5 pin DIN plug & 2.5mm jack plug cassette cable. 7 pin DIN to 5 pin DIN & 2.5mm jack cassette cable. 2.7 pin DIN to 5 pin DIN & 2.5mm jack cassette cable. CJE Micro's/4D first ever products were Cassette leads for the BBC back in 1982.