Bought mine early 2017. Normally a lover of UniFi products, but stay away from this switch. Mine was lightly loaded with 3 security cameras, unit would over heat and drop POE on all ports. Many many other people experiencing the same problems, just check the forums. https://community.ubnt.com/t5/UniFi-Routing-Switching/UniFi-Switch-16-POE-150W-Overheat/td-p/2227548/page/18 https://community.ubnt.com/t5/UniFi-Routing-Switching/USW-16-POW-150W-dropping-POE-but-not-overheating/td-p/2311094/page/5