Radical advancement in downrigger trolling technology, providing anglers with a clear, straightforward method to monitor water conditions. True depth measurement at the probe. Hydrodynamic design to cut through water. Assignable numeric identifiers for probe locations on your boat. Rapid response temperature sensor. Data refresh rate every 5 seconds on normal mode or every half-second on thermocline mode. Designed. Tested. Manufactured and assembled by Scotty and Airmar. High-performance paddle wheel delivers unmatched low-speed accuracy. Compatible with iOS, Android, and most MFDs. Bluetooth wireless connectivity and ethernet. Fast wireless charging and approximately 40 hours of battery life on a full charge. Easy to install and use. Real-time metrics at the ready in the palm of your hand to provide an informed angling experience. Accommodates up to 4 probes simultaneously. What's in the box; probe, hydrophone, stainless steel leader, power cable, communication hub, charging dock, USB-C to USB cable.