POSMA D1 GPS Wireless Cycling Bike Computer Speedometer Odometer with Navigation, Support GPX File Upload to Strava and MapMyRide Bike riding with GPS calculation, route recording and navigation. Exercise time, speed & distance, calorie, lap (lap time, auto lap, auto pause). Customize your own exercise pages (&gt; 20 measurement indicators selectable). Exercise analysis PC software (enable to export GPX file for mapping and upload to other popular platform e.g. STRAVA, MapMyRide). D series support mile display (mph). LED backlight. Rechargeable battery. Waterproof IPX7. Battery life: 15 hours.