Varia vision in sight display varia vision in sight display enhances your road awareness by putting the information you want right where you want it directly in your line of sight with an integrated accelerometer the system can be mounted on either arm of the glasses with a fully adjustable arm and eye piece for optimum display positioning the 28g featherweight device displays key data from your compatible edge cycling device edge 1000 and 520 such as performance data turn by turn directions