A gadget like this would do on a budget.
https://smile.amazon.com/dp/B0753LC2DQ/?coliid=I1XRPSOEWDB6H6&colid=26ZFCJDUMMIB2&psc=0&ref_=lv_ov_lig_dp_it
But it doesn’t have one of those tiny flashing red LEDs like they always have on TV shows............................