I'm a real novice when it comes to ice fishing. Wife and I rented a cabin in the north woods and I plan to do a bit of ice fishing.....some with tip-ups. The lake will be close to the cabin so I'd like to place a couple of tip-ups nearby. I'm looking for recommendations for a sensor that'll send a signal when the flag goes up.

About 10 years ago I received a STRIKE SENSOR as a gift but never used it. I only have one and would like to get two more of some kind. Don't know if there are other, better., etc. ones out there. 

Would appreciate suggestions/recommendations.