receiver: add WPID 0612 for VX Revolution mouse

docs/devices.md

@@ -65,8 +65,12 @@ a tuple of known feature settings (from `lib/logitech/settings_templates.py`).
 | 064d:c541 | Lightspeed | 1                  |
 | 17ef:6042 | Nano       | 1                  |
 
-* The receiver with USB Id 046d:c517 is an old 27 MHz receiver, supporting only
-  subset of HID++ 1.0 protocol. Only hardware pairing supported.
+Some Nano receivers are only partly supported
+as they do not fully implement the HID++ 1.0 protocol.
+
+The receiver with USB Id 046d:c517 is an old 27 MHz receiver, supporting only
+subset of HID++ 1.0 protocol. Only hardware pairing is supported.
+
 
 ### Keyboards (Unifying)
 

lib/logitech_receiver/descriptors.py

@@ -625,7 +625,7 @@ _D(
     codename='VX Revolution',
     kind=_DK.mouse,
     protocol=1.0,
-    wpid=('1006', '100D'),
+    wpid=('1006', '100D', '0612'),  # WPID 0612 from Issue #921
     registers=(_R.battery_charge, ),
 )
 _D(