after having buy "the smartest French" TV quiz's more fun ... by against non wired buzzers buzz are not giving 42 (postage included) with 4 buzzers connecting USB keys ... I recommend it because some buzzers are sold unbundled IMPOSSIBLE to connect the network ... we will try later ... quiz world of good evenings with friend (s) or General knowledge. + 5000 + issues with confrontation of online gamblers and ability to download additional quiz packs (option) very well ...