In the past few months, we have covered a whole host of decent waterproof headsets for swimmers. The FINIS Swim Coach Communicator takes it to the next level. It uses a smartphone’s Bluetooth signal to allow coaches to communicate with their swimmers in real-time to give them feedback on technique and pace.
The device is waterproof to 3 meters. The FINIS Swim Coach Communicator runs for up to 6 hours on battery. The FINIS Live mobile app is available for iOS/Android devices. To get started, download the app, turn on the in-app microphone, and start talking. This product is available for under $200 at this time.[where to get it]