This is a Eurostar EURO-SW-24 LNC Voltage Controlled Switcher.
It is designed to switch between different satellite signals.
It operates within a frequency range of 950-2050 MHz.
It has inputs for LNC A (17V/18V) and LNC B (13V/14V).
The switcher automatically changes between two satellite LNB feeds based on the voltage coming from the satellite receiver:
13–14V → selects LNB B (Vertical polarization)
17–18V → selects LNB A (Horizontal polarization)