The BlueTipz wireless transmitter is an alarm that alerts you on your smartphone when you have a strike on your ice fishing tip-up. It consumes no power when horizontal, so assuming 2 minutes per strike, the replaceable battery should last up to 600 fish. The super bright light is great for night fishing and identifying which tipup just alerted. Great performance with up to 600 feet range. The transmitter clips to any tipup flag. You can download the app for iPhone and Android, and with it listen for your devices or any devices.