Thaum nws los txog rau roj hmab keypads, kom ntseeg tau tias kev ua tau zoo thiab kav ntev yog qhov tseem ceeb.Rubber keypads yog siv dav hauv ntau yam khoom siv, xws li cov chaw taws teeb tswj, lub tshuab xam zauv, thiab cov khoom siv hluav taws xob.Txawm li cas los xij, dhau sijhawm, cov keyboards no tuaj yeem hnav thiab tsim kua muag, ua rau kev ua haujlwm poob qis.