To pair the bike I discovered I had to be right at the bike, put the battery in the Mahle and turn on the bike immediately for it to sync with the Mahle. After that, no problem. Initially I had put the battery in the Mahle in in my kitchen and then turned it on by My bike and it would not sync. After putting the battery in right at the bike and syncing it every thing is fine, I can remove the unit and take it to my office and it still syncs when I return to my bike,it was just that initial power up issue.