I would like to add some horizontal space to this itemize environment.

(Note that I use \tab). I tried using [itemindent=4cm] and \addtolength{\itemindent}{4cm} but the result is this:
How can I solve?
\documentclass[14pt,handout,t]{beamer}
\usepackage{tabto}
\geometry{paperwidth=297mm,paperheight=210mm}
\setbeamersize{text margin left=100pt,text margin right=100pt}
\usepackage{enumitem}
\begin{document}
\begin{frame}
\TabPositions{6cm}
\begin{itemize}%[itemindent=4cm]
% \addtolength{\itemindent}{4cm}
\item[\large$\Rightarrow$] Versione: \tab\underline{\textbf{2.40}}
\vspace{0.35cm}
\item[\large$\Rightarrow$] Ultimo aggiornamento: \tab 27 Aprile 2015
\vspace{0.35cm}
\item[\large$\Rightarrow$] Realizzato da: \tab M. Marcomarco
\end{itemize}
\end{frame}
\end{document}



/Leftarrow. – Marco Feb 07 '16 at 12:05