The Expert display (860C by name) coupled with Open Source Firmware displays all the information you need for a perfect driving experience. You can see battery voltage (with a fine estimate of remaining capacity), pedaling power (your own energy), consumption in Wh/km (to optimize your battery and go further) and much more. Its large, bright display (H x W: 96.6 x 71.6 mm) offers optimum visibility even in bright sunlight.