Update README.md

extras/cad/README.md

@@ -8,7 +8,7 @@
 
 **Tracker case**:
 - `aprs_tracker_e22_base` - base for tracker case without battery compartment.
-- `aprs_tracker_e22_cover` - upper cover for headless tracker with screen and controls.
+- `aprs_tracker_e22_cover` - upper cover for headless tracker without any controls.
 - `aprs_tracker_e22_antenna_ring` - TPU filament ring placed under antenna.
 - `aprs_tracker_e22_base_battery_lid` - lid for battery compartment.
 - `aprs_tracker_e22_base_battery` - base for tracker case with battery compartment.