you can have a open or closed back to the go pro and as its in a waterproof box it keeps the noise down evey at high speeds yet you still can hear the engine and exhaust. works well I found
That looks amazing for that price! Might have to grab one before my Euro trip this summer. What do you use to charge it at rest stops, by the way?
I use a cig lighter wired up to the optimate. You can but an optimate to cig lighter connector from optimate.