public static function settings_field_send_async()
{
$current = Falcon::get_option('bbsub_send_async', '');
echo '<label><input type="checkbox" name="bbsub_send_async" ' . checked($current, true, false) . ' /> ';
_e('Send email to subscribers asynchronously', 'falcon');
echo '</label>';
echo '<p class="description">';
_e('This will send email using a one-off wp-cron task, reducing load time on new post creation. May cause issues wtih some systems.', 'falcon');
echo '</p>';
}