Review on 🔌 UPGROW HDMI to RCA Video Audio Converter Adapter - 1080p HDMI to AV RCA CVBs Composite Supports PAL/NTSC - for TV Stick, Roku, Chromecast, Apple TV, PC, Laptop, Xbox, HDTV, DVD-Black (UPGROWHRCA01) by James Lesley

This converter box works exactly as advertised: I can plug my Firestick into it and watch it on an old TV with only RCA inputs. As an added bonus, the converter generates a color bar test pattern before you even connect the HDMI input, so you know it's working. I didn't have that before with my old, somewhat unreliable converter that I replaced (from another manufacturer). Note that the converter doesn't come with a USB power adapter, but most people already have a few laying around. However, it does come with the required mini USB power cord (not micro as is more common), which is usually less readily available.