Wheel mouse with 5 buttons (numbered)
Pier Luigi Mora (<a href="https://it.wikipedia.org/wiki/Utente:Zapping" class="extiw" title="it:Utente:Zapping">Zapping</a>) and <a href="//commons.wikimedia.org/wiki/User:Giacomo_Ritucci" title="User:Giacomo Ritucci">Giacomo Ritucci</a>
CC BY-SA 3.0
Original image courtesy of <a href="https://it.wikipedia.org/wiki/Utente:Zapping" class="extiw" title="it:Utente:Zapping">Zapping</a>, edited by me with <a rel="nofollow" class="external text" href="http://www.inkscape.org/">inkscape</a> and <a rel="nofollow" class="external text" href="http://www.gimp.org/">The GIMP</a>