The SonarPhone line starts with the $129 T-POD, which is a pocket-sized Wi-Fi transmitter that can track water at speeds up to 5 miles per hour. All models tout a wireless range of 300 feet between the transmitter and your smartphone or tablet, and each include a neoprene arm band for keeping your smartphone safely on your wrist while you fish.These products work in conjunction with the SonarPhone app, which is free for iOS and Android. The software provides an interactive glance at the water via your SonarPhone transmitter, with features like temperature tracking, depth tracking and special alarms for when fish or shallow water are detected.



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