diff --git a/README.md b/README.md
index 9bab042..4d4a3ba 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,122 @@ frappe.ui.form.on('Item', {
     }
 });
 ```
+#### Client Script mit Button mehrer Artikel
+
+```js
+
+frappe.ui.form.on('Item', {
+    refresh: function(frm) {
+        // Einzelner Button im Formular
+        frm.add_custom_button('Custom Fields zu WooCommerce syncen', function() {
+            if (!frm.doc.woocommerce_servers || frm.doc.woocommerce_servers.length === 0) {
+                frappe.msgprint("Kein WooCommerce Server verknüpft!", "Warnung");
+                return;
+            }
+            
+            frappe.call({
+                method: 'erpnext_custom.api.sync_custom_fields_to_woocommerce',
+                args: { item_code: frm.doc.name }
+            });
+        }, "WooCommerce");
+    }
+});
+
+// ==================== MASSEN-SYNC MIT FORTSCHRITT ====================
+frappe.listview_settings['Item'] = {
+    onload: function(listview) {
+        listview.page.add_inner_button('Alle Custom Fields zu WooCommerce syncen', function() {
+            let selected = listview.get_checked_items();
+            
+            if (selected.length === 0) {
+                frappe.msgprint("Bitte wählen Sie mindestens einen Artikel aus.", "Warnung");
+                return;
+            }
+            
+            frappe.confirm(`Möchten Sie wirklich ${selected.length} Artikel synchronisieren?`, function() {
+                let completed = 0;
+                let success = 0;
+                let failed = 0;
+                
+                // Fortschrittsdialog
+                let progress = new frappe.ui.Dialog({
+                    title: 'Synchronisiere Custom Fields',
+                    fields: [
+                        {
+                            fieldtype: 'HTML',
+                            fieldname: 'progress_html',
+                            options: `<div id="sync-progress" style="margin: 20px 0;">
+                                <div class="progress">
+                                    <div class="progress-bar" id="progress-bar" style="width: 0%;">0%</div>
+                                </div>
+                                <p id="progress-text" style="text-align:center; margin-top:10px;">0 von ${selected.length} verarbeitet</p>
+                            </div>`
+                        }
+                    ],
+                    primary_action_label: 'Schließen',
+                    primary_action: function() {
+                        progress.hide();
+                    }
+                });
+                
+                progress.show();
+                
+                // Artikel nacheinander syncen
+                function processNext() {
+                    if (completed >= selected.length) {
+                        progress.hide();
+                        let msg = `${success} erfolgreich, ${failed} fehlgeschlagen`;
+                        if (failed === 0) {
+                            frappe.msgprint(msg, "Erfolg");
+                        } else {
+                            frappe.msgprint(msg, "Warnung");
+                        }
+                        listview.refresh();
+                        return;
+                    }
+                    
+                    let item = selected[completed];
+                    
+                    frappe.call({
+                        method: 'erpnext_custom.api.sync_custom_fields_to_woocommerce',
+                        args: { item_code: item.name },
+                        callback: function(r) {
+                            completed++;
+                            if (r.message) {
+                                success++;
+                            } else {
+                                failed++;
+                            }
+                            
+                            // Fortschritt aktualisieren
+                            let percent = Math.round((completed / selected.length) * 100);
+                            document.getElementById('progress-bar').style.width = percent + '%';
+                            document.getElementById('progress-bar').innerText = percent + '%';
+                            document.getElementById('progress-text').innerText = completed + ' von ' + selected.length + ' verarbeitet';
+                            
+                            processNext();
+                        },
+                        error: function() {
+                            completed++;
+                            failed++;
+                            let percent = Math.round((completed / selected.length) * 100);
+                            document.getElementById('progress-bar').style.width = percent + '%';
+                            document.getElementById('progress-bar').innerText = percent + '%';
+                            document.getElementById('progress-text').innerText = completed + ' von ' + selected.length + ' verarbeitet';
+                            processNext();
+                        }
+                    });
+                }
+                
+                processNext();
+            });
+        }, "WooCommerce");
+    }
+};
+
+```
+
+
 ### Nutzung
 
 - Im Item-Dokument unter WooCommerce ACF Mapping die gewünschten Felder eintragen.