GPS accessories enhance the functionality and usability of GPS devices. Common accessories include car mounts, which secure the device for easy viewing while driving, and screen protectors that safeguard against scratches. Other useful items are power adapters for charging on the go and carrying cases for protection during travel. Additionally, GPS antennas can improve signal reception, especially in areas with poor satellite visibility. Bluetooth receivers allow for wireless connectivity with smartphones, enabling features like hands-free navigation. These accessories help users get the most out of their GPS technology, making navigation more efficient and convenient.