It is well known that Oric-1 and Oric Atmos have reliability problems loading cassettes.
The Oric Cassette Tape Signal Conditioner comes as a box (100x60x25mm) that connects between the tape recorder and the Oric computer, and converts the analog signal of the cassette into a digital signal, which makes the cassette loading much more reliable.
The video below by 8bitbaz shows the effectiveness of the Signal Conditioner (in English).
The Oric Cassette Signal Conditioner works for both Oric-1 and Oric Atmos.
It requires a 9 volt battery (LR6 type), not supplied.
The PCB is made for the battery to fit in the enclosure.
The Signal Conditioner connection is simply made with a 3.5mm jack cable.
Therefore you will also need a 3.5mm male to 3.5mm male jack cable (mono or stereo both work), not supplied.
Input and output is labelled inside the box, you cannot do a mistake!
Finally, each Signal Conditioner is tested before shipping.