Garmin GNX 120 Mast Bracket Suncover 3 units. The sun can get to the back of the solar panel damaging the GNX 120 and potentially damaging the sensor as well. The GNX 120 comes packaged with this protective UV cover. To view your device remove the solar panel and place it face down on a flat surface. Connect the digital front to the physical mast bracket making sure the device is level. Reconnect the digital front to the physical mount afterward to use your device. Specifications for Garmin GNX 120 Mast Bracket Suncover: Manufacturer: Garmin Color: Black Additional Features: 3 units Package Contents: Garmin GNX 120 Mast Bracket Suncover Garmin 010-12236-06: GNX 120 Mast Bracket Suncover 3 units