My advice is simple, pay someone to come to your business and teach you how to use every single piece of equipment, learn every feature, get them to show you what to do when the little red light flashes, how to turn it on and off, where to put the plugs, where to go online and get more information or other resources. (inc.com)
This thermometer is amazing because a little red light flashes if the water is too hot, it is digital too so it is really easy to see if the bath is the recommended 36 (ish) degrees for your baby. (naptimenatter.com)
When I suck on the «cigarette», a little red light appears at the end of the tube,... (newscientist.com)