Outdoor events with a beer have an interesting feature that in a few moments they can turn into a megaparty. Sometimes an innocent grill or one beer for a match with friends is enough and... When the party starts strongly, it's hard to control the number of bottles drunk, but just a glance at the opener with the meter and everything becomes clear!
If you happen to be at parties where the number of drunk breweries is not easy to count (even uncountable), then you must consider having an opener with a meter. This invention of human technical thought will allow you to control the number of open bottles and will serve the current state of consumption at any time.
Power Source
LR44 batteries, 1 piece - included