diff --git a/Modem-control-using-KISS-protocol-extension.md b/Modem-control-using-KISS-protocol-extension.md
index d485881..8449d84 100644
--- a/Modem-control-using-KISS-protocol-extension.md
+++ b/Modem-control-using-KISS-protocol-extension.md
@@ -32,4 +32,9 @@ Payloads for commands are sent and expected as big endian and defined as:
   // KISS command 8
   struct Reboot {
   } __attribute__((packed));
+
+  // KISS command 9
+  struct Telemetry {
+    int16_t batteryVoltage;
+  } __attribute__((packed));
 ```