I bought it for children), to play policemen . the children were delighted, under the guise they took mushrooms and fishing. They work great, they say that their range is not large, I don’t know . in the forest they definitely diverged for a couple of kilometers (just fine), they checked at home . our fourth floor went down to the first (that is, several concrete floors) and walked around the house, no interference, excellent walkie-talkie for your money. I bought hittele. Com for two walkie-talSee full review