I be skeptic when I buy db390 because wireless rear speaker be a new technology implementation use bluetooth . I be pleasantly surprise when it take I little effort to set it up follow the manual and the wireless receiver work well . my main concern be that I have 802.11 b\/g router that use 2.4 Ghz also , and I have a wireless bluetooth headset , but so far everything work great ! I have not have any issue when use all my device -lrb- wireless network , db390 , and headset -rrb- at the same time !