Powershell Script to Find Permissions at Item Level for a Particular SharePoint List

$siteurl = read-host "Enter the site url"
$site = get-spsite $siteurl
$web = $site.rootWeb

$listname = read-host "Enter the list name"
$list = $web.Lists[$listname]

$listitem = $list.Items
foreach ($item in $listitem)
{
   write-host "Permission for the list item " $item.name -fore yellow
   foreach ($role in $item.RoleAssignments)
   {
      $users = $role.member.name
      foreach ($roledef in $role.RoleDefinitionBindings)
      {
         write-host $users ":" $roledef.name
      }
   }
}