UV-A light is what you might find in a black light - it's a large-wavelength version of UV light that generally isn't hazardous. UV-C - what most phone sanitizers use - is a small-wavelength kind ...
LEDs are used which produce 405nm UV-A light. The manufacturer, Luminus, does not recommend that part for disinfection or sterilization. Luminus sells UV-C LEDs for that purpose, generating 275-285nm.