MyFishFinder.com Just like iceshanty but warmer
Can you just put reflective tape on your flags, hit them with a flashlight to see if they're up
For what it's worth, I tested bluetipz out today at about 120 yards and it worked great. The receiver / booster was passed me at closer to 130 yards and my phone was in my coat pocket. I'm happy and will probably buy a couple more if I can get them at a discount at the end of the season. We're only allowed 3 lines in WI, but I wouldn't mind having a couple more for friends or my kids.