Very interesting question. Hardware tips may vary depending on the type of business you are running. For example, this is a restaurant or cafe you need good equipment in the kitchen. And if you are, for example, the owner of a bar, night club, or gas station, then your priority will be safety based on personal experience. Personally, I use id scanners https://idscan.net/ to protect my establishments. this is a simple and reliable way to fill in your business. I am sure that this method of protection is the future.