When my kids go outside to play, if I'm not with them (or if I can't see them) they know they have to check in with me every 30 minutes (they aren't little, but they don't have phones yet). They used to try SO HARD to use that check in time as a way to talk me into getting them phones, but these timers have changed that game up! when they leave, they set it for 25min so when it goes off, they know to come check in. It's brilliant and I love it. I also love that they come in a 12 pack so when I get "I lost my timer so I couldn't check in on time!" I can just hand them another one. Go team!easy to useThese work great in the kitchen or around the house. I do wish the magnet was stronger as if they are put on a door or something else that gets jard around they fall easily. So if you have a heavy oven door that takes a lot of effort just set it on the counter or it may fall into your dinner.I bought these timers for different purposes in my life, one being a timer I can use at the pool to time my exercises. And it woks great for that. The timer isn’t too loud so it doesn’t seem to bother the other swimmers around me. I love that it’s also water resistant and has a little stand in the back to prop it up.But I time a lot of stuff in my life: time in a detox bath, time to allow eyelash glue remover to dissolve the glue on my lash extensions, time myself sunning, time under the UV light for gel polish. And even an extra timer in the kitchen. I love that there are several in this kit, I have them all over the house and in my gym bag.Personally, I love them and I’m glad I bought them. And so far every one of them have worked well. I’ll be sure to update if that changes. No, I’m not a paid schill for the manufacturer. Just a regular person who found something she needs and was glad it worked. (Amazon can be such a crapshoot anymore.)These timers are great. We use them at my school all the time but one was defective. I wrote the seller about this and received to response. They cost $2 each so one being defective should result in a refund for that one and not having to return all 6 but I heard nothing so they don’t care.This is larger and louder than others we have used. Works great.Love that the numbers are big and keeps and the timer counting up or down is easy to use. Plus you can stand it up in a desk too or magnet to hold on a white boardits so much easier to set the time on these than use an app on your phone or apple watch or other hi tech gadget.Having 6 means you can leave them all around where you need them .one is using its magnet to be on the metal fan hood above the stove.one is next to the bed for naps. one is next to the front door to set for the lawn sprinkler.one is next to my computer to remind me to take a break.and I still have some extras! Maybe I'll put one in the car for naps etc.the alarm is plenty loud to be heard from one room to another . it will also wake you up from a nap. the alarm wont keep ringing forever if you don't stop it which is nice. i think it sounds for maybe 20 seconds or a minute. Haven't timed it. It's long enough to hear but not long enough to annoy if you cant get off the phone to shut it off (unlike my microwave!).they are easy to set and they remember the last setting when you turn them off and then turn them on.Literally just click the minute button as many times as you want to set the minutes. so 5 or 20 minutes takes just a second to set. then press the start button and it begins counting down.when you have so many of them you really use them. if you only had one and had to get it from the kitchen to use for a nap in the bedroom then it would be a pain. but to have six is great!you find you will time all sort s of things.set an alarm by your computer to remind you to take a break etc.they use one battery. I just got a pack of batteries from the dollar tree and even though dollar tree batteries are often sort of old so far none have run out. i turn the side switch off after using them.I didn't get any bad ones but when you get six in the package if you did get one bad one it wouldn't be a big deal.Highly recommended!it's like having lots of reading glasses lying around the house. six are better than one!!