The Fish Hawk Lithium Ultra Probe transmits speed and temperature data at depth, and the true depth of your downrigger using water pressure. The Ultra is our new flagship model and is compatible with its predecessor, the X4D Bluetooth. Charging Ahead! The Fish Hawk Electronics Lithium Series incorporates four decades of experience with the lithium power anglers expect in modern electronics. The new, maintenance-free probe is 40% smaller than its predecessor and provides more than 50-hours of fishing time on a single full charge. Underwater currents make trolling speeds at depth unpredictable. Temperature throughout the water column can change dramatically. Fish Hawk Electronics delivers speed and temperature data at depth to make trolling more efficient and effective. You can’t get this information from traditional fishing electronics. Compatible with Fish Hawk X4D Bluetooth Transmits speed and water temperature at depth, and true depth Lithium Series Probe provides 50+ hours of fishing from a single charge Probe fully charges in 2-4 hours, partially charges in 20 minutes 5,000+ lifetime probe charges Water-activated probe extends battery life Smaller profile cuts through water and minimizes blowback Works on any downrigger Probe uses a 70kHz sonar signal to send data Includes wireless charging pad and USB-C cable FH450
