I think as an alarm they are great nice and sensitive when you need it, give good indication and work, I do find battery life is a bit pants though, but I just keep a load of spares in my bag for when they start beeping, I do think low quality batteries drain a lot faster, I got some amazon industrials last time and they seem to hold up a bit better, but they handle all weather, if I could be bothered I would remove the batteries after each session but generally I am in a rush and forget 😁