Don’t have a water craft, but still want the privilege using a fish finder? The T-POD is a completely portable floating Wi-Fi transmitter that can be cast from shore. All you need is the free SonarPhone app for either Android or iOS via the respective app stores. Paired with the T-POD, this application will turn your smart phone or tablet into a fully functional sonar system that can measure depths up to 120 feet. The device can indicate water temperature and is impact resistant, so you can cast it countless times and it will still be workable. Its battery lasts for four hours per charge and can be charged via a USB port. You may cast it or troll it—it will activate once it makes contact with water.