diff --git a/lib/logitech_receiver/base.py b/lib/logitech_receiver/base.py
index 0bbe5f88..47a76a16 100644
--- a/lib/logitech_receiver/base.py
+++ b/lib/logitech_receiver/base.py
@@ -107,6 +107,8 @@ _CENTURION_MSG_SIZE = 63  # max reconstructed message size after unwrapping (2 +
 
 # Set of handles that use Centurion framing
 _centurion_handles: set[int] = set()
+# Raw Centurion protocol version (major, minor) by handle, from ping response
+_centurion_protocol_versions: dict[int, tuple[int, int]] = {}
 
 
 """Default timeout on read (in seconds)."""
@@ -300,6 +302,7 @@ def close(handle):
         try:
             if isinstance(handle, int):
                 _centurion_handles.discard(handle)
+                _centurion_protocol_versions.pop(handle, None)
                 hidapi.close(handle)
             else:
                 handle.close()
@@ -715,7 +718,11 @@ def ping(handle, devnumber, long_message: bool = False):
                     mark_ok = is_centurion or reply_data[4:5] == request_data[-1:]
                     if reply_data[:2] == request_data[:2] and mark_ok:
                         # HID++ 2.0+ device, currently connected
-                        return ord(reply_data[2:3]) + ord(reply_data[3:4]) / 10.0
+                        major = ord(reply_data[2:3])
+                        minor = ord(reply_data[3:4])
+                        if is_centurion:
+                            _centurion_protocol_versions[int(handle)] = (major, minor)
+                        return major + minor / 10.0
 
                     if (
                         report_id == HIDPP_SHORT_MESSAGE_ID
diff --git a/lib/logitech_receiver/device.py b/lib/logitech_receiver/device.py
index cb9ec47b..2c787fba 100644
--- a/lib/logitech_receiver/device.py
+++ b/lib/logitech_receiver/device.py
@@ -1089,6 +1089,10 @@ class Device:
                 return False
             if protocol:
                 self._protocol = protocol
+                # Pick up raw Centurion protocol version from ping response
+                cent_ver = base._centurion_protocol_versions.get(int(handle))
+                if cent_ver:
+                    self._centurion_protocol = cent_ver
             # Dongle responded — now check if headset is actually on by probing through bridge.
             # Send ROOT.GetFeature(0x0001) to the sub-device via CentPPBridge.
             bridge_idx = getattr(self, "_centurion_bridge_index", None)
diff --git a/lib/solaar/cli/show.py b/lib/solaar/cli/show.py
index 673dfd2b..f0214fd3 100644
--- a/lib/solaar/cli/show.py
+++ b/lib/solaar/cli/show.py
@@ -164,7 +164,11 @@ def _print_device(dev, num=None):
     print("     Kind         :", dev.kind)
     if dev.protocol:
         proto_name = "Centurion" if is_centurion else "HID++"
-        print(f"     Protocol     : {proto_name} {dev.protocol:1.1f}")
+        cent_proto = getattr(dev, "_centurion_protocol", None)
+        if cent_proto:
+            print(f"     Protocol     : {proto_name} {cent_proto[0]}.{cent_proto[1]}")
+        else:
+            print(f"     Protocol     : {proto_name} {dev.protocol:1.1f}")
     else:
         print("     Protocol     : unknown (device is offline)")
     if not is_centurion and dev.polling_rate:
diff --git a/lib/solaar/ui/window.py b/lib/solaar/ui/window.py
index a9f117e1..f2d5ed5f 100644
--- a/lib/solaar/ui/window.py
+++ b/lib/solaar/ui/window.py
@@ -536,7 +536,13 @@ def _update_details(button):
                 if device.product_id:
                     yield _("Product ID"), f"{LOGITECH_VENDOR_ID:04x}:" + device.product_id
                 hid_version = device.protocol
-                yield _("Protocol"), f"HID++ {hid_version:1.1f}" if hid_version else _("Unknown")
+                cent_proto = getattr(device, "_centurion_protocol", None)
+                if cent_proto:
+                    yield _("Protocol"), f"Centurion {cent_proto[0]}.{cent_proto[1]}"
+                elif hid_version:
+                    yield _("Protocol"), f"HID++ {hid_version:1.1f}"
+                else:
+                    yield _("Protocol"), _("Unknown")
                 if read_all and device.polling_rate:
                     yield _("Polling rate"), device.polling_rate