We hope you fine this information helpful. One tip we have found regarding the power cable is you want to solder all your connections instead of crimping them. Crimped connections vibrate and the power fluctuation will make your GPS turn off while you are riding. Another tip is you want the back light of the gps to stay on while you are riding so you can see it in the sunlight. If you don’t have the external 12 volt power cord installed, your back light will not stay continuously.