The Velleman IR light barrier PMK120 kit

Kits
1

What kind of IR leds (transmitter side) and Phototransistor (Receiver side) are used in theIR light barrier?
Is there a specification and can I buy Leds and transistor seperate?
Thank you.

Yvonne

2

Here’s the emitter
https://www.velleman.eu/products/view/?id=374070&lang=en
and this is the receiver
https://www.velleman.eu/products/view/?id=374122&lang=en

3

Thank you very much.