add doc
diff --git a/examples/speaker.json b/examples/speaker.json
new file mode 100644
index 0000000..61ce80d
--- /dev/null
+++ b/examples/speaker.json
@@ -0,0 +1,5 @@
+{
+    "name": "Bumble Speaker",
+    "class_of_device": 2360324,
+    "keystore": "JsonKeyStore"
+}